diff --git a/conf/__init_conf__.php b/conf/__init_conf__.php
--- a/conf/__init_conf__.php
+++ b/conf/__init_conf__.php
@@ -1,7 +1,6 @@
 <?php
 
 function phabricator_read_config_file($original_config) {
-
   $root = dirname(dirname(__FILE__));
 
   // Accept either "myconfig" (preferred) or "myconfig.conf.php".
@@ -9,7 +8,6 @@
   $full_config_path = $root.'/conf/'.$config.'.conf.php';
 
   if (!Filesystem::pathExists($full_config_path)) {
-
     // These are very old configuration files which we used to ship with
     // by default. File based configuration was de-emphasized once web-based
     // configuration was built. The actual files were removed to reduce
@@ -37,12 +35,14 @@
       $file = trim($file, './');
       $files[$key] = preg_replace('/\.conf\.php$/', '', $file);
     }
-    $files = "    ".implode("\n    ", $files);
+    $files = '    '.implode("\n    ", $files);
 
     throw new Exception(
-      "CONFIGURATION ERROR\n".
-      "Config file '{$original_config}' does not exist. Valid config files ".
-      "are:\n\n".$files);
+      pht(
+        "CONFIGURATION ERROR\n".
+        "Config file '%s' does not exist. Valid config files are:\n\n%s",
+        $original_config,
+        $files));
   }
 
   // Make sure config file errors are reported.
@@ -58,7 +58,11 @@
   ini_set('display_errors', $old_display_errors);
 
   if ($conf === false) {
-    throw new Exception("Failed to read config file '{$config}': {$errors}");
+    throw new Exception(
+      pht(
+        "Failed to read config file '%s': %s",
+        $config,
+        $errors));
   }
 
   return $conf;
diff --git a/resources/sql/patches/20130508.releephtransactionsmig.php b/resources/sql/patches/20130508.releephtransactionsmig.php
--- a/resources/sql/patches/20130508.releephtransactionsmig.php
+++ b/resources/sql/patches/20130508.releephtransactionsmig.php
@@ -5,4 +5,4 @@
 // already migrated, so this was cleaned up when ReleephRequestEvent was
 // removed.
 
-echo "(This migration is obsolete.)\n";
+echo pht('(This migration is obsolete.)')."\n";
diff --git a/src/aphront/sink/__tests__/AphrontHTTPSinkTestCase.php b/src/aphront/sink/__tests__/AphrontHTTPSinkTestCase.php
--- a/src/aphront/sink/__tests__/AphrontHTTPSinkTestCase.php
+++ b/src/aphront/sink/__tests__/AphrontHTTPSinkTestCase.php
@@ -75,7 +75,9 @@
     $this->assertEqual(
       'for (;;);{"x":"\u003ciframe\u003e"}',
       $sink->getEmittedData(),
-      'JSONResponse should prevent content-sniffing attacks.');
+      pht(
+        '%s should prevent content-sniffing attacks.',
+        'JSONResponse'));
   }
 
 
diff --git a/src/applications/almanac/controller/AlmanacBindingEditController.php b/src/applications/almanac/controller/AlmanacBindingEditController.php
--- a/src/applications/almanac/controller/AlmanacBindingEditController.php
+++ b/src/applications/almanac/controller/AlmanacBindingEditController.php
@@ -87,7 +87,7 @@
       ->appendControl(
         id(new AphrontFormTokenizerControl())
           ->setName('interfacePHIDs')
-          ->setLabel('Interface')
+          ->setLabel(pht('Interface'))
           ->setLimit(1)
           ->setDatasource(new AlmanacInterfaceDatasource())
           ->setValue($v_interface)
diff --git a/src/applications/almanac/controller/AlmanacConsoleController.php b/src/applications/almanac/controller/AlmanacConsoleController.php
--- a/src/applications/almanac/controller/AlmanacConsoleController.php
+++ b/src/applications/almanac/controller/AlmanacConsoleController.php
@@ -38,7 +38,7 @@
     $crumbs->addTextCrumb(pht('Console'));
 
     $box = id(new PHUIObjectBoxView())
-      ->setHeaderText('Console')
+      ->setHeaderText(pht('Console'))
       ->appendChild($menu);
 
     return $this->buildApplicationPage(
diff --git a/src/applications/audit/editor/PhabricatorAuditCommentEditor.php b/src/applications/audit/editor/PhabricatorAuditCommentEditor.php
--- a/src/applications/audit/editor/PhabricatorAuditCommentEditor.php
+++ b/src/applications/audit/editor/PhabricatorAuditCommentEditor.php
@@ -44,7 +44,9 @@
 
     return array(
       'diffusion-audit-'.$commit->getPHID(),
-      'Commit r'.$repository->getCallsign().$commit->getCommitIdentifier(),
+      pht(
+        'Commit %s',
+        'r'.$repository->getCallsign().$commit->getCommitIdentifier()),
     );
   }
 
diff --git a/src/applications/audit/editor/PhabricatorAuditEditor.php b/src/applications/audit/editor/PhabricatorAuditEditor.php
--- a/src/applications/audit/editor/PhabricatorAuditEditor.php
+++ b/src/applications/audit/editor/PhabricatorAuditEditor.php
@@ -609,7 +609,7 @@
     $name = $repository->formatCommitName($identifier);
 
     $subject = "{$name}: {$summary}";
-    $thread_topic = "Commit {$monogram}{$identifier}";
+    $thread_topic = pht('Commit %s', $monogram.$identifier);
 
     $template = id(new PhabricatorMetaMTAMail())
       ->setSubject($subject)
diff --git a/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php b/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
--- a/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
+++ b/src/applications/conpherence/__tests__/ConpherenceRoomTestCase.php
@@ -161,7 +161,7 @@
       ->setNewValue(array('+' => $participant_phids));
     $xactions[] = id(new ConpherenceTransaction())
       ->setTransactionType(ConpherenceTransaction::TYPE_TITLE)
-      ->setNewValue('Test');
+      ->setNewValue(pht('Test'));
 
     id(new ConpherenceEditor())
       ->setActor($creator)
diff --git a/src/applications/differential/storage/DifferentialTransaction.php b/src/applications/differential/storage/DifferentialTransaction.php
--- a/src/applications/differential/storage/DifferentialTransaction.php
+++ b/src/applications/differential/storage/DifferentialTransaction.php
@@ -8,7 +8,7 @@
   const TYPE_UPDATE  = 'differential:update';
   const TYPE_ACTION  = 'differential:action';
   const TYPE_STATUS  = 'differential:status';
- 
+
   const MAILTAG_REVIEWERS      = 'differential-reviewers';
   const MAILTAG_CLOSED         = 'differential-committed';
   const MAILTAG_CC             = 'differential-cc';
diff --git a/src/applications/differential/view/DifferentialChangesetListView.php b/src/applications/differential/view/DifferentialChangesetListView.php
--- a/src/applications/differential/view/DifferentialChangesetListView.php
+++ b/src/applications/differential/view/DifferentialChangesetListView.php
@@ -190,7 +190,7 @@
       } else {
         $detail->setAutoload(isset($this->visibleChangesets[$key]));
         if (isset($this->visibleChangesets[$key])) {
-          $load = 'Loading...';
+          $load = pht('Loading...');
         } else {
           $load = javelin_tag(
             'a',
diff --git a/src/applications/differential/view/DifferentialResultsTableView.php b/src/applications/differential/view/DifferentialResultsTableView.php
--- a/src/applications/differential/view/DifferentialResultsTableView.php
+++ b/src/applications/differential/view/DifferentialResultsTableView.php
@@ -78,7 +78,7 @@
           'href'        => '#',
           'mustcapture' => true,
         ),
-        'Hide');
+        pht('Hide'));
 
       $rows[] = javelin_tag(
         'tr',
diff --git a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
--- a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
+++ b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
@@ -36,15 +36,14 @@
   }
 
   public function render() {
-
     $this->requireResource('differential-core-view-css');
     $this->requireResource('differential-revision-history-css');
 
     $data = array(
       array(
-        'name' => 'Base',
+        'name' => pht('Base'),
         'id'   => null,
-        'desc' => 'Base',
+        'desc' => pht('Base'),
         'age'  => null,
         'obj'  => null,
       ),
@@ -53,7 +52,7 @@
     $seq = 0;
     foreach ($this->diffs as $diff) {
       $data[] = array(
-        'name' => 'Diff '.(++$seq),
+        'name' => pht('Diff %d', ++$seq),
         'id'   => $diff->getID(),
         'desc' => $diff->getDescription(),
         'age'  => $diff->getDateCreated(),
diff --git a/src/applications/diffusion/controller/DiffusionLintController.php b/src/applications/diffusion/controller/DiffusionLintController.php
--- a/src/applications/diffusion/controller/DiffusionLintController.php
+++ b/src/applications/diffusion/controller/DiffusionLintController.php
@@ -116,7 +116,7 @@
             ->setValue($owners))
         ->appendChild(
           id(new AphrontFormSubmitControl())
-            ->setValue('Filter'));
+            ->setValue(pht('Filter')));
       $content[] = id(new AphrontListFilterView())->appendChild($form);
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionRepositoryEditHostingController.php b/src/applications/diffusion/controller/DiffusionRepositoryEditHostingController.php
--- a/src/applications/diffusion/controller/DiffusionRepositoryEditHostingController.php
+++ b/src/applications/diffusion/controller/DiffusionRepositoryEditHostingController.php
@@ -181,7 +181,7 @@
           '%s: This repository is hosted elsewhere, so Phabricator can not '.
           'perform writes. This mode will act like "Read Only" for '.
           'repositories hosted elsewhere.',
-          phutil_tag('strong', array(), 'WARNING')),
+          phutil_tag('strong', array(), pht('WARNING'))),
       );
     }
 
diff --git a/src/applications/diffusion/view/DiffusionHistoryTableView.php b/src/applications/diffusion/view/DiffusionHistoryTableView.php
--- a/src/applications/diffusion/view/DiffusionHistoryTableView.php
+++ b/src/applications/diffusion/view/DiffusionHistoryTableView.php
@@ -149,7 +149,7 @@
         $summary = AphrontTableView::renderSingleDisplayLine(
           $history->getSummary());
       } else {
-        $summary = phutil_tag('em', array(), "Importing\xE2\x80\xA6");
+        $summary = phutil_tag('em', array(), pht("Importing\xE2\x80\xA6"));
       }
 
       $build = null;
diff --git a/src/applications/doorkeeper/engine/DoorkeeperObjectRef.php b/src/applications/doorkeeper/engine/DoorkeeperObjectRef.php
--- a/src/applications/doorkeeper/engine/DoorkeeperObjectRef.php
+++ b/src/applications/doorkeeper/engine/DoorkeeperObjectRef.php
@@ -29,8 +29,7 @@
 
   public function getExternalObject() {
     if (!$this->externalObject) {
-      throw new Exception(
-        'Call attachExternalObject() before getExternalObject()!');
+      throw new PhutilInvalidStateException('attachExternalObject');
     }
     return $this->externalObject;
   }
diff --git a/src/applications/drydock/blueprint/DrydockBlueprintImplementation.php b/src/applications/drydock/blueprint/DrydockBlueprintImplementation.php
--- a/src/applications/drydock/blueprint/DrydockBlueprintImplementation.php
+++ b/src/applications/drydock/blueprint/DrydockBlueprintImplementation.php
@@ -155,7 +155,7 @@
       $resource->endReadLocking();
     if ($allocated) {
       $resource->saveTransaction();
-      $this->log('Allocated Lease');
+      $this->log(pht('Allocated Lease'));
     } else {
       $resource->killTransaction();
       $this->log(pht('Failed to Allocate Lease'));
diff --git a/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php b/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
--- a/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
+++ b/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
@@ -80,7 +80,9 @@
     $this->log(pht('Complete.'));
 
     $resource = $this->newResourceTemplate(
-      'Working Copy ('.$repository->getCallsign().')');
+      pht(
+        'Working Copy (%s)',
+        $repository->getCallsign()));
     $resource->setStatus(DrydockResourceStatus::STATUS_OPEN);
     $resource->setAttribute('lease.host', $host_lease->getID());
     $resource->setAttribute('path', $path);
diff --git a/src/applications/drydock/view/DrydockLogListView.php b/src/applications/drydock/view/DrydockLogListView.php
--- a/src/applications/drydock/view/DrydockLogListView.php
+++ b/src/applications/drydock/view/DrydockLogListView.php
@@ -43,16 +43,16 @@
     $table->setDeviceReadyTable(true);
     $table->setHeaders(
       array(
-        'Resource',
-        'Lease',
-        'Message',
-        'Date',
+        pht('Resource'),
+        pht('Lease'),
+        pht('Message'),
+        pht('Date'),
       ));
     $table->setShortHeaders(
       array(
         'R',
         'L',
-        'Message',
+        pht('Message'),
         '',
       ));
     $table->setColumnClasses(
diff --git a/src/applications/fact/controller/PhabricatorFactHomeController.php b/src/applications/fact/controller/PhabricatorFactHomeController.php
--- a/src/applications/fact/controller/PhabricatorFactHomeController.php
+++ b/src/applications/fact/controller/PhabricatorFactHomeController.php
@@ -109,7 +109,7 @@
       ->setUser($user)
       ->appendChild(
         id(new AphrontFormSelectControl())
-          ->setLabel('Y-Axis')
+          ->setLabel(pht('Y-Axis'))
           ->setName('y1')
           ->setOptions($options))
       ->appendChild(
diff --git a/src/applications/harbormaster/controller/HarbormasterPlanRunController.php b/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
--- a/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
+++ b/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
@@ -82,7 +82,7 @@
           $plan->getID()))
       ->appendChild(
         id(new AphrontFormTextControl())
-          ->setLabel('Buildable Name')
+          ->setLabel(pht('Buildable Name'))
           ->setName('buildablePHID')
           ->setError($e_name)
           ->setValue($v_name));
diff --git a/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php b/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
--- a/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildPlanSearchEngine.php
@@ -44,7 +44,7 @@
     $form
       ->appendChild(
         id(new AphrontFormCheckboxControl())
-          ->setLabel('Status')
+          ->setLabel(pht('Status'))
           ->addCheckbox(
             'status[]',
             HarbormasterBuildPlan::STATUS_ACTIVE,
diff --git a/src/applications/herald/storage/transcript/HeraldTranscript.php b/src/applications/herald/storage/transcript/HeraldTranscript.php
--- a/src/applications/herald/storage/transcript/HeraldTranscript.php
+++ b/src/applications/herald/storage/transcript/HeraldTranscript.php
@@ -183,9 +183,9 @@
 
   public function getMetadataMap() {
     return array(
-      'Run At Epoch' => date('F jS, g:i:s A', $this->time),
-      'Run On Host'  => $this->host,
-      'Run Duration' => (int)(1000 * $this->duration).' ms',
+      pht('Run At Epoch') => date('F jS, g:i:s A', $this->time),
+      pht('Run On Host')  => $this->host,
+      pht('Run Duration') => (int)(1000 * $this->duration).' ms',
     );
   }
 
diff --git a/src/applications/macro/editor/PhabricatorMacroEditor.php b/src/applications/macro/editor/PhabricatorMacroEditor.php
--- a/src/applications/macro/editor/PhabricatorMacroEditor.php
+++ b/src/applications/macro/editor/PhabricatorMacroEditor.php
@@ -155,7 +155,7 @@
 
   protected function buildMailTemplate(PhabricatorLiskDAO $object) {
     $name = $object->getName();
-    $name = 'Image Macro "'.$name.'"';
+    $name = pht('Image Macro "%s"', $name);
 
     return id(new PhabricatorMetaMTAMail())
       ->setSubject($name)
diff --git a/src/applications/maniphest/config/PhabricatorManiphestConfigOptions.php b/src/applications/maniphest/config/PhabricatorManiphestConfigOptions.php
--- a/src/applications/maniphest/config/PhabricatorManiphestConfigOptions.php
+++ b/src/applications/maniphest/config/PhabricatorManiphestConfigOptions.php
@@ -212,16 +212,16 @@
 
     $status_example = array(
       'open' => array(
-        'name' => 'Open',
+        'name' => pht('Open'),
         'special' => 'default',
       ),
       'closed' => array(
-        'name' => 'Closed',
+        'name' => pht('Closed'),
         'special' => 'closed',
         'closed' => true,
       ),
       'duplicate' => array(
-        'name' => 'Duplicate',
+        'name' => pht('Duplicate'),
         'special' => 'duplicate',
         'closed' => true,
       ),
diff --git a/src/applications/maniphest/constants/__tests__/ManiphestTaskStatusTestCase.php b/src/applications/maniphest/constants/__tests__/ManiphestTaskStatusTestCase.php
--- a/src/applications/maniphest/constants/__tests__/ManiphestTaskStatusTestCase.php
+++ b/src/applications/maniphest/constants/__tests__/ManiphestTaskStatusTestCase.php
@@ -34,16 +34,16 @@
 
     $valid = array(
       'open' => array(
-        'name' => 'Open',
+        'name' => pht('Open'),
         'special' => 'default',
       ),
       'closed' => array(
-        'name' => 'Closed',
+        'name' => pht('Closed'),
         'special' => 'closed',
         'closed' => true,
       ),
       'duplicate' => array(
-        'name' => 'Duplicate',
+        'name' => pht('Duplicate'),
         'special' => 'duplicate',
         'closed' => true,
       ),
@@ -52,7 +52,7 @@
 
     // We should raise on a bad key.
     $bad_key = $valid;
-    $bad_key['!'] = array('name' => 'Exclaim');
+    $bad_key['!'] = array('name' => pht('Exclaim'));
     $this->assertConfigValid(false, pht('Bad Key'), $bad_key);
 
     // We should raise on a value type.
@@ -68,7 +68,7 @@
     // We should raise on two statuses with the same special.
     $double_close = $valid;
     $double_close['finished'] = array(
-      'name' => 'Finished',
+      'name' => pht('Finished'),
       'special' => 'closed',
       'closed' => true,
     );
diff --git a/src/applications/maniphest/controller/ManiphestReportController.php b/src/applications/maniphest/controller/ManiphestReportController.php
--- a/src/applications/maniphest/controller/ManiphestReportController.php
+++ b/src/applications/maniphest/controller/ManiphestReportController.php
@@ -589,7 +589,7 @@
       $cname[] = $label;
       $cclass[] = 'n';
     }
-    $cname[] = 'Total';
+    $cname[] = pht('Total');
     $cclass[] = 'n';
     $cname[] = javelin_tag(
       'span',
diff --git a/src/applications/meta/controller/PhabricatorApplicationUninstallController.php b/src/applications/meta/controller/PhabricatorApplicationUninstallController.php
--- a/src/applications/meta/controller/PhabricatorApplicationUninstallController.php
+++ b/src/applications/meta/controller/PhabricatorApplicationUninstallController.php
@@ -53,16 +53,16 @@
     if ($this->action == 'install') {
       if ($selected->canUninstall()) {
         $dialog
-          ->setTitle('Confirmation')
+          ->setTitle(pht('Confirmation'))
           ->appendChild(
             pht(
               'Install %s application?',
               $selected->getName()))
-          ->addSubmitButton('Install');
+          ->addSubmitButton(pht('Install'));
 
       } else {
         $dialog
-          ->setTitle('Information')
+          ->setTitle(pht('Information'))
           ->appendChild(pht('You cannot install an installed application.'));
       }
     } else {
diff --git a/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php b/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
--- a/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
+++ b/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
@@ -23,7 +23,7 @@
 
     if (!$this->verifyMessage()) {
       throw new Exception(
-        'Mail signature is not valid. Check your Mailgun API key.');
+        pht('Mail signature is not valid. Check your Mailgun API key.'));
     }
 
     $request = $this->getRequest();
diff --git a/src/applications/metamta/receiver/__tests__/PhabricatorMailReceiverTestCase.php b/src/applications/metamta/receiver/__tests__/PhabricatorMailReceiverTestCase.php
--- a/src/applications/metamta/receiver/__tests__/PhabricatorMailReceiverTestCase.php
+++ b/src/applications/metamta/receiver/__tests__/PhabricatorMailReceiverTestCase.php
@@ -18,7 +18,7 @@
     foreach ($same as $address) {
       $this->assertTrue(
         PhabricatorMailReceiver::matchAddresses($base, $address),
-        "Address {$address}");
+        pht('Address %s', $address));
     }
 
     $diff = array(
diff --git a/src/applications/people/typeahead/PhabricatorPeopleDatasource.php b/src/applications/people/typeahead/PhabricatorPeopleDatasource.php
--- a/src/applications/people/typeahead/PhabricatorPeopleDatasource.php
+++ b/src/applications/people/typeahead/PhabricatorPeopleDatasource.php
@@ -72,9 +72,9 @@
       }
 
       if ($this->enrichResults) {
-        $display_type = 'User';
+        $display_type = pht('User');
         if ($user->getIsAdmin()) {
-          $display_type = 'Administrator';
+          $display_type = pht('Administrator');
         }
         $result->setDisplayType($display_type);
         $result->setImageURI($handles[$user->getPHID()]->getImageURI());
diff --git a/src/applications/phame/application/PhabricatorPhameApplication.php b/src/applications/phame/application/PhabricatorPhameApplication.php
--- a/src/applications/phame/application/PhabricatorPhameApplication.php
+++ b/src/applications/phame/application/PhabricatorPhameApplication.php
@@ -15,7 +15,7 @@
   }
 
   public function getShortDescription() {
-    return 'Blog';
+    return pht('Blog');
   }
 
   public function getTitleGlyph() {
diff --git a/src/applications/phame/storage/PhamePost.php b/src/applications/phame/storage/PhamePost.php
--- a/src/applications/phame/storage/PhamePost.php
+++ b/src/applications/phame/storage/PhamePost.php
@@ -167,13 +167,13 @@
 
     if ($current == 'facebook' ||
         PhabricatorFacebookAuthProvider::getFacebookApplicationID()) {
-      $options['facebook'] = 'Facebook';
+      $options['facebook'] = pht('Facebook');
     }
     if ($current == 'disqus' ||
         PhabricatorEnv::getEnvConfig('disqus.shortname')) {
-      $options['disqus'] = 'Disqus';
+      $options['disqus'] = pht('Disqus');
     }
-    $options['none'] = 'None';
+    $options['none'] = pht('None');
 
     return $options;
   }
diff --git a/src/applications/pholio/controller/PholioMockEditController.php b/src/applications/pholio/controller/PholioMockEditController.php
--- a/src/applications/pholio/controller/PholioMockEditController.php
+++ b/src/applications/pholio/controller/PholioMockEditController.php
@@ -93,7 +93,7 @@
       $mock_xactions[$type_cc]   = array('=' => $v_cc);
 
       if (!strlen($request->getStr('name'))) {
-        $e_name = 'Required';
+        $e_name = pht('Required');
         $errors[] = pht('You must give the mock a name.');
       }
 
diff --git a/src/applications/phortune/controller/PhortuneProductListController.php b/src/applications/phortune/controller/PhortuneProductListController.php
--- a/src/applications/phortune/controller/PhortuneProductListController.php
+++ b/src/applications/phortune/controller/PhortuneProductListController.php
@@ -17,7 +17,9 @@
     $title = pht('Product List');
 
     $crumbs = $this->buildApplicationCrumbs();
-    $crumbs->addTextCrumb('Products', $this->getApplicationURI('product/'));
+    $crumbs->addTextCrumb(
+      pht('Products'),
+      $this->getApplicationURI('product/'));
     $crumbs->addAction(
       id(new PHUIListItemView())
         ->setName(pht('Create Product'))
diff --git a/src/applications/phortune/controller/PhortuneProviderActionController.php b/src/applications/phortune/controller/PhortuneProviderActionController.php
--- a/src/applications/phortune/controller/PhortuneProviderActionController.php
+++ b/src/applications/phortune/controller/PhortuneProviderActionController.php
@@ -44,12 +44,10 @@
       return $response;
     }
 
-    $title = 'Phortune';
-
     return $this->buildApplicationPage(
       $response,
       array(
-        'title' => $title,
+        'title' => pht('Phortune'),
       ));
   }
 
diff --git a/src/applications/phpast/controller/PhabricatorXHPASTViewRunController.php b/src/applications/phpast/controller/PhabricatorXHPASTViewRunController.php
--- a/src/applications/phpast/controller/PhabricatorXHPASTViewRunController.php
+++ b/src/applications/phpast/controller/PhabricatorXHPASTViewRunController.php
@@ -41,7 +41,7 @@
           ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL))
       ->appendChild(
         id(new AphrontFormSubmitControl())
-          ->setValue('Parse'));
+          ->setValue(pht('Parse')));
 
     $form_box = id(new PHUIObjectBoxView())
       ->setHeaderText(pht('Generate XHP AST'))
diff --git a/src/applications/phragment/controller/PhragmentBrowseController.php b/src/applications/phragment/controller/PhragmentBrowseController.php
--- a/src/applications/phragment/controller/PhragmentBrowseController.php
+++ b/src/applications/phragment/controller/PhragmentBrowseController.php
@@ -78,7 +78,7 @@
           $item->addAttribute(pht('Deleted'));
         }
       } else {
-        $item->addAttribute('Directory');
+        $item->addAttribute(pht('Directory'));
       }
       $list->addItem($item);
     }
diff --git a/src/applications/phragment/controller/PhragmentHistoryController.php b/src/applications/phragment/controller/PhragmentHistoryController.php
--- a/src/applications/phragment/controller/PhragmentHistoryController.php
+++ b/src/applications/phragment/controller/PhragmentHistoryController.php
@@ -67,7 +67,7 @@
 
       if ($version->getFilePHID() === null) {
         $item->setDisabled(true);
-        $item->addAttribute('Deletion');
+        $item->addAttribute(pht('Deletion'));
       }
 
       if (!$first && $can_edit) {
diff --git a/src/applications/phragment/controller/PhragmentSnapshotCreateController.php b/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
--- a/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
+++ b/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
@@ -89,8 +89,8 @@
       'tr',
       array(),
       array(
-        phutil_tag('th', array(), 'Fragment'),
-        phutil_tag('th', array(), 'Version'),
+        phutil_tag('th', array(), pht('Fragment')),
+        phutil_tag('th', array(), pht('Version')),
       ));
     $rows[] = phutil_tag(
       'tr',
diff --git a/src/applications/phragment/controller/PhragmentZIPController.php b/src/applications/phragment/controller/PhragmentZIPController.php
--- a/src/applications/phragment/controller/PhragmentZIPController.php
+++ b/src/applications/phragment/controller/PhragmentZIPController.php
@@ -68,7 +68,7 @@
     }
 
     if (!$zip->open((string)$temp, ZipArchive::CREATE)) {
-      throw new Exception('Unable to create ZIP archive!');
+      throw new Exception(pht('Unable to create ZIP archive!'));
     }
 
     $mappings = $this->getFragmentMappings($fragment, $fragment->getPath());
diff --git a/src/applications/project/editor/__tests__/PhabricatorProjectEditorTestCase.php b/src/applications/project/editor/__tests__/PhabricatorProjectEditorTestCase.php
--- a/src/applications/project/editor/__tests__/PhabricatorProjectEditorTestCase.php
+++ b/src/applications/project/editor/__tests__/PhabricatorProjectEditorTestCase.php
@@ -227,7 +227,7 @@
 
   private function createProject(PhabricatorUser $user) {
     $project = PhabricatorProject::initializeNewProject($user);
-    $project->setName('Test Project '.mt_rand());
+    $project->setName(pht('Test Project %d', mt_rand()));
     $project->save();
 
     return $project;
@@ -247,7 +247,7 @@
 
     $user = new PhabricatorUser();
     $user->setUsername('unittestuser'.$rand);
-    $user->setRealName('Unit Test User '.$rand);
+    $user->setRealName(pht('Unit Test User %d', $rand));
 
     return $user;
   }
diff --git a/src/applications/project/typeahead/PhabricatorProjectDatasource.php b/src/applications/project/typeahead/PhabricatorProjectDatasource.php
--- a/src/applications/project/typeahead/PhabricatorProjectDatasource.php
+++ b/src/applications/project/typeahead/PhabricatorProjectDatasource.php
@@ -64,7 +64,7 @@
       $proj_result = id(new PhabricatorTypeaheadResult())
         ->setName($all_strings)
         ->setDisplayName($proj->getName())
-        ->setDisplayType('Project')
+        ->setDisplayType(pht('Project'))
         ->setURI('/tag/'.$proj->getPrimarySlug().'/')
         ->setPHID($proj->getPHID())
         ->setIcon($proj->getIcon())
diff --git a/src/applications/releeph/controller/request/ReleephRequestEditController.php b/src/applications/releeph/controller/request/ReleephRequestEditController.php
--- a/src/applications/releeph/controller/request/ReleephRequestEditController.php
+++ b/src/applications/releeph/controller/request/ReleephRequestEditController.php
@@ -250,7 +250,7 @@
           ->addHiddenInput('requestIdentifierRaw', 'D'.$diff_rev_id)
           ->appendChild(
             id(new AphrontFormStaticControl())
-              ->setLabel('Diff')
+              ->setLabel(pht('Diff'))
               ->setValue($title));
       } else {
         $origin = $branch->getURI();
diff --git a/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php b/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
--- a/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
+++ b/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
@@ -51,7 +51,7 @@
   }
 
   public function renderLabelForRevisionView() {
-    return 'Releeph';
+    return pht('Releeph');
   }
 
   public function getRequiredHandlePHIDs() {
@@ -246,7 +246,7 @@
   }
 
   public function renderLabelForCommitMessage() {
-    return 'Releeph';
+    return pht('Releeph');
   }
 
   public function shouldAppearOnCommitMessageTemplate() {
diff --git a/src/applications/releeph/field/specification/ReleephAuthorFieldSpecification.php b/src/applications/releeph/field/specification/ReleephAuthorFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephAuthorFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephAuthorFieldSpecification.php
@@ -8,7 +8,7 @@
   }
 
   public function getName() {
-    return 'Author';
+    return pht('Author');
   }
 
   public function getRequiredHandlePHIDsForPropertyView() {
diff --git a/src/applications/releeph/field/specification/ReleephBranchCommitFieldSpecification.php b/src/applications/releeph/field/specification/ReleephBranchCommitFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephBranchCommitFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephBranchCommitFieldSpecification.php
@@ -8,7 +8,7 @@
   }
 
   public function getName() {
-    return 'Commit';
+    return pht('Commit');
   }
 
   public function getRequiredHandlePHIDsForPropertyView() {
diff --git a/src/applications/releeph/field/specification/ReleephDiffMessageFieldSpecification.php b/src/applications/releeph/field/specification/ReleephDiffMessageFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephDiffMessageFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephDiffMessageFieldSpecification.php
@@ -8,7 +8,7 @@
   }
 
   public function getName() {
-    return 'Message';
+    return pht('Message');
   }
 
   public function getStyleForPropertyView() {
diff --git a/src/applications/releeph/field/specification/ReleephIntentFieldSpecification.php b/src/applications/releeph/field/specification/ReleephIntentFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephIntentFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephIntentFieldSpecification.php
@@ -8,7 +8,7 @@
   }
 
   public function getName() {
-    return 'Intent';
+    return pht('Intent');
   }
 
   public function getRequiredHandlePHIDsForPropertyView() {
diff --git a/src/applications/releeph/field/specification/ReleephLevelFieldSpecification.php b/src/applications/releeph/field/specification/ReleephLevelFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephLevelFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephLevelFieldSpecification.php
@@ -37,7 +37,7 @@
     }
 
     $control = id(new AphrontFormRadioButtonControl())
-      ->setLabel('Level')
+      ->setLabel(pht('Level'))
       ->setName($control_name)
       ->setValue($level);
 
@@ -75,7 +75,7 @@
 
   public function validate($value) {
     if ($value === null) {
-      $this->error = 'Required';
+      $this->error = pht('Required');
       $label = $this->getName();
       throw new ReleephFieldParseException(
         $this,
diff --git a/src/applications/releeph/field/specification/ReleephOriginalCommitFieldSpecification.php b/src/applications/releeph/field/specification/ReleephOriginalCommitFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephOriginalCommitFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephOriginalCommitFieldSpecification.php
@@ -8,7 +8,7 @@
   }
 
   public function getName() {
-    return 'Commit';
+    return pht('Commit');
   }
 
   public function getRequiredHandlePHIDsForPropertyView() {
diff --git a/src/applications/releeph/field/specification/ReleephReasonFieldSpecification.php b/src/applications/releeph/field/specification/ReleephReasonFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephReasonFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephReasonFieldSpecification.php
@@ -44,7 +44,7 @@
 
   public function validate($reason) {
     if (!$reason) {
-      $this->error = 'Required';
+      $this->error = pht('Required');
       throw new ReleephFieldParseException(
         $this,
         pht('You must give a reason for your request.'));
@@ -53,8 +53,8 @@
 
   public function renderHelpForArcanist() {
     $text = pht(
-      "Fully explain why you are requesting this code be included ".
-      "in the next release.\n");
+      'Fully explain why you are requesting this code be included '.
+      'in the next release.')."\n";
     return phutil_console_wrap($text, 8);
   }
 
diff --git a/src/applications/releeph/field/specification/ReleephSeverityFieldSpecification.php b/src/applications/releeph/field/specification/ReleephSeverityFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephSeverityFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephSeverityFieldSpecification.php
@@ -11,7 +11,7 @@
   }
 
   public function getName() {
-    return 'Severity';
+    return pht('Severity');
   }
 
   public function getStorageKey() {
diff --git a/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php b/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
@@ -14,7 +14,7 @@
   }
 
   public function getName() {
-    return 'Summary';
+    return pht('Summary');
   }
 
   public function getStorageKey() {
@@ -25,7 +25,7 @@
 
   public function renderEditControl(array $handles) {
     return id(new AphrontFormTextControl())
-      ->setLabel('Summary')
+      ->setLabel(pht('Summary'))
       ->setName('summary')
       ->setError($this->error)
       ->setValue($this->getValue())
diff --git a/src/applications/releeph/query/ReleephRequestSearchEngine.php b/src/applications/releeph/query/ReleephRequestSearchEngine.php
--- a/src/applications/releeph/query/ReleephRequestSearchEngine.php
+++ b/src/applications/releeph/query/ReleephRequestSearchEngine.php
@@ -157,11 +157,11 @@
     if (ReleephDefaultFieldSelector::isFacebook()) {
       return array(
         '' => pht('(All Severities)'),
-        11 => 'HOTFIX',
-        12 => 'PIGGYBACK',
-        13 => 'RELEASE',
-        14 => 'DAILY',
-        15 => 'PARKING',
+        11 => pht('HOTFIX'),
+        12 => pht('PIGGYBACK'),
+        13 => pht('RELEASE'),
+        14 => pht('DAILY'),
+        15 => pht('PARKING'),
       );
     } else {
       return array(
diff --git a/src/applications/repository/constants/PhabricatorRepositoryType.php b/src/applications/repository/constants/PhabricatorRepositoryType.php
--- a/src/applications/repository/constants/PhabricatorRepositoryType.php
+++ b/src/applications/repository/constants/PhabricatorRepositoryType.php
@@ -18,7 +18,7 @@
 
   public static function getNameForRepositoryType($type) {
     $map = self::getAllRepositoryTypes();
-    return idx($map, $type, 'Unknown');
+    return idx($map, $type, pht('Unknown'));
   }
 
 }
diff --git a/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php b/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
--- a/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
+++ b/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
@@ -100,7 +100,10 @@
     }
 
     throw new Exception(
-      "No such {$until_type} '{$until_name}' in repository!");
+      pht(
+        "No such %s '%s' in repository!",
+        $until_type,
+        $until_name));
   }
 
 
diff --git a/src/applications/repository/engine/PhabricatorRepositoryEngine.php b/src/applications/repository/engine/PhabricatorRepositoryEngine.php
--- a/src/applications/repository/engine/PhabricatorRepositoryEngine.php
+++ b/src/applications/repository/engine/PhabricatorRepositoryEngine.php
@@ -68,7 +68,10 @@
     $matches = null;
     if (!preg_match('/^\s*Fetch URL:\s*(.*?)\s*$/m', $remotes, $matches)) {
       throw new Exception(
-        "Expected 'Fetch URL' in 'git remote show -n origin'.");
+        pht(
+          "Expected '%s' in '%s'.",
+          'Fetch URL',
+          'git remote show -n origin'));
     }
 
     $remote_uri = $matches[1];
diff --git a/src/applications/repository/management/PhabricatorRepositoryManagementImportingWorkflow.php b/src/applications/repository/management/PhabricatorRepositoryManagementImportingWorkflow.php
--- a/src/applications/repository/management/PhabricatorRepositoryManagementImportingWorkflow.php
+++ b/src/applications/repository/management/PhabricatorRepositoryManagementImportingWorkflow.php
@@ -60,16 +60,16 @@
           $status = $row['importStatus'];
           $need = array();
           if (!($status & PhabricatorRepositoryCommit::IMPORTED_MESSAGE)) {
-            $need[] = 'Message';
+            $need[] = pht('Message');
           }
           if (!($status & PhabricatorRepositoryCommit::IMPORTED_CHANGE)) {
-            $need[] = 'Change';
+            $need[] = pht('Change');
           }
           if (!($status & PhabricatorRepositoryCommit::IMPORTED_OWNERS)) {
-            $need[] = 'Owners';
+            $need[] = pht('Owners');
           }
           if (!($status & PhabricatorRepositoryCommit::IMPORTED_HERALD)) {
-            $need[] = 'Herald';
+            $need[] = pht('Herald');
           }
 
           $console->writeOut(' %s', implode(', ', $need));
diff --git a/src/applications/repository/storage/__tests__/PhabricatorRepositoryURITestCase.php b/src/applications/repository/storage/__tests__/PhabricatorRepositoryURITestCase.php
--- a/src/applications/repository/storage/__tests__/PhabricatorRepositoryURITestCase.php
+++ b/src/applications/repository/storage/__tests__/PhabricatorRepositoryURITestCase.php
@@ -27,7 +27,7 @@
 
     $repo = PhabricatorRepository::initializeNewRepository($user)
       ->setVersionControlSystem($svn)
-      ->setName('Test Repo')
+      ->setName(pht('Test Repo'))
       ->setCallsign('TESTREPO')
       ->setCredentialPHID($http_credential->getPHID())
       ->save();
diff --git a/src/applications/transactions/exception/PhabricatorApplicationTransactionNoEffectException.php b/src/applications/transactions/exception/PhabricatorApplicationTransactionNoEffectException.php
--- a/src/applications/transactions/exception/PhabricatorApplicationTransactionNoEffectException.php
+++ b/src/applications/transactions/exception/PhabricatorApplicationTransactionNoEffectException.php
@@ -15,7 +15,7 @@
     $this->hasComment = $has_comment;
 
     $message = array();
-    $message[] = 'Transactions have no effect:';
+    $message[] = pht('Transactions have no effect:');
     foreach ($this->transactions as $transaction) {
       $message[] = '  - '.$transaction->getNoEffectDescription();
     }
diff --git a/src/applications/uiexample/examples/PHUITimelineExample.php b/src/applications/uiexample/examples/PHUITimelineExample.php
--- a/src/applications/uiexample/examples/PHUITimelineExample.php
+++ b/src/applications/uiexample/examples/PHUITimelineExample.php
@@ -96,8 +96,8 @@
     $events[] = id(new PHUITimelineEventView())
       ->setUserHandle($handle)
       ->setIcon('fa-tag')
-      ->setTitle(str_repeat('Long Text Title ', 64))
-      ->appendChild(str_repeat('Long Text Body ', 64))
+      ->setTitle(str_repeat(pht('Long Text Title').' ', 64))
+      ->appendChild(str_repeat(pht('Long Text Body').' ', 64))
       ->setColor(PhabricatorTransactions::COLOR_ORANGE);
 
     $events[] = id(new PHUITimelineEventView())
diff --git a/src/applications/uiexample/examples/PhabricatorAphrontBarUIExample.php b/src/applications/uiexample/examples/PhabricatorAphrontBarUIExample.php
--- a/src/applications/uiexample/examples/PhabricatorAphrontBarUIExample.php
+++ b/src/applications/uiexample/examples/PhabricatorAphrontBarUIExample.php
@@ -53,7 +53,7 @@
     }
 
     return $this->wrap(
-      'Glyph bars in weird order',
+      pht('Glyph bars in weird order'),
       $views);
   }
 
@@ -61,12 +61,13 @@
     $bar = id(new AphrontGlyphBarView())
         ->setValue(50)
         ->setMax(100)
-        ->setCaption('Glyphs!')
+        ->setCaption(pht('Glyphs!'))
         ->setNumGlyphs(10)
         ->setGlyph(hsprintf('%s', '*'));
 
     return $this->wrap(
-      'Ascii star glyph bar', $bar);
+      pht('ASCII star glyph bar'),
+      $bar);
   }
 
 }
diff --git a/src/applications/uiexample/examples/PhabricatorPagedFormUIExample.php b/src/applications/uiexample/examples/PhabricatorPagedFormUIExample.php
--- a/src/applications/uiexample/examples/PhabricatorPagedFormUIExample.php
+++ b/src/applications/uiexample/examples/PhabricatorPagedFormUIExample.php
@@ -22,28 +22,28 @@
       ->addControl(
         id(new AphrontFormTextControl())
           ->setName('page1')
-          ->setLabel('Page 1'));
+          ->setLabel(pht('Page 1')));
 
     $page2 = id(new PHUIFormPageView())
       ->setPageName(pht('Page 2'))
       ->addControl(
         id(new AphrontFormTextControl())
           ->setName('page2')
-          ->setLabel('Page 2'));
+          ->setLabel(pht('Page 2')));
 
     $page3 = id(new PHUIFormPageView())
       ->setPageName(pht('Page 3'))
       ->addControl(
         id(new AphrontFormTextControl())
           ->setName('page3')
-          ->setLabel('Page 3'));
+          ->setLabel(pht('Page 3')));
 
     $page4 = id(new PHUIFormPageView())
       ->setPageName(pht('Page 4'))
       ->addControl(
         id(new AphrontFormTextControl())
           ->setName('page4')
-          ->setLabel('Page 4'));
+          ->setLabel(pht('Page 4')));
 
     $form = new PHUIPagedFormView();
     $form->setUser($user);
diff --git a/src/applications/uiexample/examples/PhabricatorPagerUIExample.php b/src/applications/uiexample/examples/PhabricatorPagerUIExample.php
--- a/src/applications/uiexample/examples/PhabricatorPagerUIExample.php
+++ b/src/applications/uiexample/examples/PhabricatorPagerUIExample.php
@@ -23,7 +23,7 @@
     $rows = array();
     for ($ii = $offset; $ii < min($item_count, $offset + $page_size); $ii++) {
       $rows[] = array(
-        'Item #'.($ii + 1),
+        pht('Item #%d', $ii + 1),
       );
     }
 
diff --git a/src/applications/uiexample/examples/PhabricatorSortTableUIExample.php b/src/applications/uiexample/examples/PhabricatorSortTableUIExample.php
--- a/src/applications/uiexample/examples/PhabricatorSortTableUIExample.php
+++ b/src/applications/uiexample/examples/PhabricatorSortTableUIExample.php
@@ -18,28 +18,28 @@
         'model'   => 'Civic',
         'year'    => 2004,
         'price'   => 3199,
-        'color'   => 'Blue',
+        'color'   => pht('Blue'),
       ),
       array(
         'make'    => 'Ford',
         'model'   => 'Focus',
         'year'    => 2001,
         'price'   => 2549,
-        'color'   => 'Red',
+        'color'   => pht('Red'),
       ),
       array(
         'make'    => 'Toyota',
         'model'   => 'Camry',
         'year'    => 2009,
         'price'   => 4299,
-        'color'   => 'Black',
+        'color'   => pht('Black'),
       ),
       array(
         'make'    => 'NASA',
         'model'   => 'Shuttle',
         'year'    => 1998,
         'price'   => 1000000000,
-        'color'   => 'White',
+        'color'   => pht('White'),
       ),
     );
 
diff --git a/src/applications/xhprof/controller/PhabricatorXHProfController.php b/src/applications/xhprof/controller/PhabricatorXHProfController.php
--- a/src/applications/xhprof/controller/PhabricatorXHProfController.php
+++ b/src/applications/xhprof/controller/PhabricatorXHProfController.php
@@ -5,7 +5,7 @@
   public function buildStandardPageResponse($view, array $data) {
     $page = $this->buildStandardPageView();
 
-    $page->setApplicationName('XHProf');
+    $page->setApplicationName(pht('XHProf'));
     $page->setBaseURI('/xhprof/');
     $page->setTitle(idx($data, 'title'));
     $page->setGlyph("\xE2\x98\x84");
diff --git a/src/infrastructure/PhabricatorEditor.php b/src/infrastructure/PhabricatorEditor.php
--- a/src/infrastructure/PhabricatorEditor.php
+++ b/src/infrastructure/PhabricatorEditor.php
@@ -17,7 +17,7 @@
   final public function requireActor() {
     $actor = $this->getActor();
     if (!$actor) {
-      throw new Exception('You must setActor()!');
+      throw new PhutilInvalidStateException('setActor');
     }
     return $actor;
   }
diff --git a/src/infrastructure/customfield/exception/PhabricatorCustomFieldImplementationIncompleteException.php b/src/infrastructure/customfield/exception/PhabricatorCustomFieldImplementationIncompleteException.php
--- a/src/infrastructure/customfield/exception/PhabricatorCustomFieldImplementationIncompleteException.php
+++ b/src/infrastructure/customfield/exception/PhabricatorCustomFieldImplementationIncompleteException.php
@@ -15,12 +15,14 @@
       $name = $field->getFieldName();
     }
 
-    $class = get_class($field);
-
     parent::__construct(
-      "Custom field '{$name}' (with key '{$key}', of class '{$class}') is ".
-      "incompletely implemented: it claims to support a feature, but does not ".
-      "implement all of the required methods for that feature.");
+      pht(
+        "Custom field '%s' (with key '%s', of class '%s') is incompletely ".
+        "implemented: it claims to support a feature, but does not ".
+        "implement all of the required methods for that feature.",
+        $name,
+        $key,
+        get_class($field)));
   }
 
 }
diff --git a/src/infrastructure/customfield/field/PhabricatorCustomField.php b/src/infrastructure/customfield/field/PhabricatorCustomField.php
--- a/src/infrastructure/customfield/field/PhabricatorCustomField.php
+++ b/src/infrastructure/customfield/field/PhabricatorCustomField.php
@@ -59,10 +59,11 @@
 
       $spec = $object->getCustomFieldSpecificationForRole($role);
       if (!is_array($spec)) {
-        $obj_class = get_class($object);
         throw new Exception(
-          "Expected an array from getCustomFieldSpecificationForRole() for ".
-          "object of class '{$obj_class}'.");
+          pht(
+            "Expected an array from %s for object of class '%s'.",
+            'getCustomFieldSpecificationForRole()',
+            get_class($object)));
       }
 
       $fields = self::buildFieldList(
@@ -128,10 +129,13 @@
       foreach ($field_object->createFields($object) as $field) {
         $key = $field->getFieldKey();
         if (isset($fields[$key])) {
-          $original_class = $from_map[$key];
           throw new Exception(
-            "Both '{$original_class}' and '{$current_class}' define a custom ".
-            "field with field key '{$key}'. Field keys must be unique.");
+            pht(
+              "Both '%s' and '%s' define a custom field with ".
+              "field key '%s'. Field keys must be unique.",
+              $from_map[$key],
+              $current_class,
+              $key));
         }
         $from_map[$key] = $current_class;
         $fields[$key] = $field;
@@ -290,7 +294,7 @@
       case self::ROLE_DEFAULT:
         return true;
       default:
-        throw new Exception("Unknown field role '{$role}'!");
+        throw new Exception(pht("Unknown field role '%s'!", $role));
     }
   }
 
diff --git a/src/infrastructure/customfield/field/PhabricatorCustomFieldAttachment.php b/src/infrastructure/customfield/field/PhabricatorCustomFieldAttachment.php
--- a/src/infrastructure/customfield/field/PhabricatorCustomFieldAttachment.php
+++ b/src/infrastructure/customfield/field/PhabricatorCustomFieldAttachment.php
@@ -20,7 +20,9 @@
   public function getCustomFieldList($role) {
     if (empty($this->lists[$role])) {
       throw new PhabricatorCustomFieldNotAttachedException(
-        "Role list '{$role}' is not available!");
+        pht(
+          "Role list '%s}' is not available!",
+          $role));
     }
     return $this->lists[$role];
   }
diff --git a/src/infrastructure/daemon/bot/handler/PhabricatorBotObjectNameHandler.php b/src/infrastructure/daemon/bot/handler/PhabricatorBotObjectNameHandler.php
--- a/src/infrastructure/daemon/bot/handler/PhabricatorBotObjectNameHandler.php
+++ b/src/infrastructure/daemon/bot/handler/PhabricatorBotObjectNameHandler.php
@@ -114,7 +114,7 @@
                 'poll_id' => $vote_id,
               ));
             $output[$vote['phid']] = 'V'.$vote['id'].': '.$vote['question'].
-              ' Come Vote '.$vote['uri'];
+              ' '.pht('Come Vote').' '.$vote['uri'];
           }
         }
 
diff --git a/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php b/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php
--- a/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php
+++ b/src/infrastructure/daemon/workers/PhabricatorTaskmasterDaemon.php
@@ -29,7 +29,7 @@
             } else if ($ex instanceof PhabricatorWorkerYieldException) {
               $this->log(pht('Task %s yielded.', $id));
             } else {
-              $this->log("Task {$id} failed!");
+              $this->log(pht('Task %d failed!', $id));
               throw new PhutilProxyException(
                 pht('Error while executing Task ID %d.', $id),
                 $ex);
diff --git a/src/infrastructure/daemon/workers/management/PhabricatorWorkerManagementExecuteWorkflow.php b/src/infrastructure/daemon/workers/management/PhabricatorWorkerManagementExecuteWorkflow.php
--- a/src/infrastructure/daemon/workers/management/PhabricatorWorkerManagementExecuteWorkflow.php
+++ b/src/infrastructure/daemon/workers/management/PhabricatorWorkerManagementExecuteWorkflow.php
@@ -42,10 +42,11 @@
         $task->getDataID());
       $task->setData($task_data->getData());
 
-      $id = $task->getID();
-      $class = $task->getTaskClass();
-
-      $console->writeOut("Executing task {$id} ({$class})...");
+      $console->writeOut(
+        pht(
+          'Executing task %d (%s)...',
+          $task->getID(),
+          $task->getTaskClass()));
 
       $task = $task->executeTask();
       $ex = $task->getExecutionException();
diff --git a/src/infrastructure/storage/management/PhabricatorStorageManagementAPI.php b/src/infrastructure/storage/management/PhabricatorStorageManagementAPI.php
--- a/src/infrastructure/storage/management/PhabricatorStorageManagementAPI.php
+++ b/src/infrastructure/storage/management/PhabricatorStorageManagementAPI.php
@@ -191,7 +191,7 @@
         $this->applyPatchPHP($name);
         break;
       default:
-        throw new Exception("Unable to apply patch of type '{$type}'.");
+        throw new Exception(pht("Unable to apply patch of type '%s'.", $type));
     }
   }
 
diff --git a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementUpgradeWorkflow.php b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementUpgradeWorkflow.php
--- a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementUpgradeWorkflow.php
+++ b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementUpgradeWorkflow.php
@@ -200,12 +200,13 @@
       if (!$applied_something) {
         if (count($patches)) {
           throw new Exception(
-            'Some patches could not be applied: '.
-            implode(', ', array_keys($patches)));
+            pht(
+              'Some patches could not be applied: %s',
+              implode(', ', array_keys($patches))));
         } else if (!$is_dry && !$apply_only) {
           echo pht(
-            "Storage is up to date. Use '%s' for details.\n",
-            'storage status');
+            "Storage is up to date. Use '%s' for details.",
+            'storage status')."\n";
         }
         break;
       }
diff --git a/src/infrastructure/testing/PhabricatorTestCase.php b/src/infrastructure/testing/PhabricatorTestCase.php
--- a/src/infrastructure/testing/PhabricatorTestCase.php
+++ b/src/infrastructure/testing/PhabricatorTestCase.php
@@ -184,7 +184,7 @@
     $seed = $this->getNextObjectSeed();
 
     $user = id(new PhabricatorUser())
-      ->setRealName("Test User {$seed}}")
+      ->setRealName(pht('Test User %d', $seed))
       ->setUserName("test{$seed}")
       ->setIsApproved(1);
 
@@ -211,15 +211,17 @@
     if (!self::$testsAreRunning) {
       throw new Exception(
         pht(
-          'Executing test code outside of test execution! This code path can '.
-          'only be run during unit tests.'));
+          'Executing test code outside of test execution! '.
+          'This code path can only be run during unit tests.'));
     }
   }
 
   protected function requireBinaryForTest($binary) {
     if (!Filesystem::binaryExists($binary)) {
       $this->assertSkipped(
-        pht('No binary "%s" found on this system, skipping test.', $binary));
+        pht(
+          'No binary "%s" found on this system, skipping test.',
+          $binary));
     }
   }
 
diff --git a/src/view/AphrontDialogView.php b/src/view/AphrontDialogView.php
--- a/src/view/AphrontDialogView.php
+++ b/src/view/AphrontDialogView.php
@@ -234,7 +234,10 @@
       case self::WIDTH_DEFAULT:
         break;
       default:
-        throw new Exception("Unknown dialog width '{$this->width}'!");
+        throw new Exception(
+          pht(
+            "Unknown dialog width '%s'!",
+            $this->width));
     }
 
     if ($this->isStandalone) {
diff --git a/src/view/form/control/AphrontFormDateControl.php b/src/view/form/control/AphrontFormDateControl.php
--- a/src/view/form/control/AphrontFormDateControl.php
+++ b/src/view/form/control/AphrontFormDateControl.php
@@ -61,7 +61,7 @@
       $this->valueTime = $time;
 
       // Assume invalid.
-      $err = 'Invalid';
+      $err = pht('Invalid');
 
       $zone = $this->getTimezone();
 
diff --git a/src/view/layout/__tests__/PHUIListViewTestCase.php b/src/view/layout/__tests__/PHUIListViewTestCase.php
--- a/src/view/layout/__tests__/PHUIListViewTestCase.php
+++ b/src/view/layout/__tests__/PHUIListViewTestCase.php
@@ -110,14 +110,14 @@
     return id(new PHUIListItemView())
       ->setKey($key)
       ->setHref('#')
-      ->setName('Link');
+      ->setName(pht('Link'));
   }
 
   private function newLabel($key) {
     return id(new PHUIListItemView())
       ->setType(PHUIListItemView::TYPE_LABEL)
       ->setKey($key)
-      ->setName('Label');
+      ->setName(pht('Label'));
   }
 
   private function newABCMenu() {