diff --git a/CRM/Utils/Hook.php b/CRM/Utils/Hook.php
index e8014d314371..5dbdb614faf5 100644
--- a/CRM/Utils/Hook.php
+++ b/CRM/Utils/Hook.php
@@ -2101,6 +2101,27 @@ public static function angularModules(&$angularModules) {
     );
   }
 
+  /**
+   * Alter the definition of some Angular HTML partials.
+   *
+   * @param \Civi\Angular\HtmlCollection $html
+   *
+   * @code
+   * function example_civicrm_angularPartials(HtmlCollection $html) {
+   *   if ($doc = $html->get('~/crmMailing/EditMailingCtrl/2step.html')) {
+   *     $doc->find('[ng-form="crmMailingSubform"]')
+   *       ->attr('cat-stevens', 'ts(\'wild world\')');
+   *   }
+   * }
+   * @endCode
+   */
+  public static function angularPartials($html) {
+    $event = \Civi\Core\Event\GenericHookEvent::create(array(
+      'html' => $html,
+    ));
+    Civi::dispatcher()->dispatch('hook_civicrm_angularPartials', $event);
+  }
+
   /**
    * This hook is called whenever the system builds a new copy of
    * semi-static asset.
diff --git a/Civi/Angular/Manager.php b/Civi/Angular/Manager.php
index 2f87ee73741d..7dfaf90311f2 100644
--- a/Civi/Angular/Manager.php
+++ b/Civi/Angular/Manager.php
@@ -202,7 +202,7 @@ protected function resolvePatterns($modules) {
   }
 
   /**
-   * Get the partial HTML documents for a module.
+   * Get the partial HTML documents for a module (unfiltered).
    *
    * @param string $name
    *   Angular module name.
@@ -211,12 +211,7 @@ protected function resolvePatterns($modules) {
    * @throws \Exception
    *   Invalid partials configuration.
    */
-  public function getPartials($name) {
-    $cacheKey = "angular-partials::$name";
-    $cacheValue = $this->cache->get($cacheKey);
-    if ($cacheValue !== NULL) {
-      return $cacheValue;
-    }
+  public function getRawPartials($name) {
     $module = $this->getModule($name);
     $result = array();
     if (isset($module['partials'])) {
@@ -228,12 +223,36 @@ public function getPartials($name) {
           $result[$filename] = file_get_contents($partialDir . '/' . $file);
         }
       }
+      return $result;
     }
-
-    $this->cache->set($cacheKey, $result);
     return $result;
   }
 
+  /**
+   * Get the partial HTML documents for a module.
+   *
+   * @param string $name
+   *   Angular module name.
+   * @return array
+   *   Array(string $extFilePath => string $html)
+   * @throws \Exception
+   *   Invalid partials configuration.
+   */
+  public function getPartials($name) {
+    $cacheKey = "angular-partials::$name";
+    $cacheValue = $this->cache->get($cacheKey);
+    if ($cacheValue !== NULL) {
+      return $cacheValue;
+    }
+
+    $html = new HtmlCollection($this->getRawPartials($name));
+    \CRM_Utils_Hook::angularPartials($html);
+    $cacheValue = $html->getStrings();
+
+    $this->cache->set($cacheKey, $cacheValue);
+    return $cacheValue;
+  }
+
   /**
    * Get list of translated strings for a module.
    *
diff --git a/tests/phpunit/Civi/Angular/ManagerTest.php b/tests/phpunit/Civi/Angular/ManagerTest.php
index 3ab7d8939ded..ba3c2d26ae81 100644
--- a/tests/phpunit/Civi/Angular/ManagerTest.php
+++ b/tests/phpunit/Civi/Angular/ManagerTest.php
@@ -109,7 +109,17 @@ public function testGetModules() {
    */
   public function testGetPartials() {
     $partials = $this->angular->getPartials('crmMailing');
-    $this->assertRegExp('/ng-form="crmMailing/', $partials['~/crmMailing/EditMailingCtrl/2step.html']);
+    $this->assertRegExp('/ng-form="crmMailingSubform">/', $partials['~/crmMailing/EditMailingCtrl/2step.html']);
+    // If crmMailing changes, feel free to use a different example.
+  }
+
+  /**
+   * Get HTML fragments from an example module. The HTML is modified via hook.
+   */
+  public function testGetPartials_Hooked() {
+    \CRM_Utils_Hook::singleton()->setHook('civicrm_angularPartials', array($this, 'hook_civicrm_angularPartials'));
+    $partials = $this->angular->getPartials('crmMailing');
+    $this->assertRegExp('/ng-form="crmMailingSubform" cat-stevens="ts\\(\'wild world\'\\)">/', $partials['~/crmMailing/EditMailingCtrl/2step.html']);
     // If crmMailing changes, feel free to use a different example.
   }
 
@@ -122,4 +132,21 @@ public function testGetStrings() {
     // If crmMailing changes, feel free to use a different example.
   }
 
+  /**
+   * Get a translatable string from an example module. The HTML is modified via hook.
+   */
+  public function testGetStrings_Hooked() {
+    \CRM_Utils_Hook::singleton()->setHook('civicrm_angularPartials', array($this, 'hook_civicrm_angularPartials'));
+    $strings = $this->angular->getStrings('crmMailing');
+    $this->assertTrue(in_array('wild world', $strings));
+    // If crmMailing changes, feel free to use a different example.
+  }
+
+  public function hook_civicrm_angularPartials(HtmlCollection $html) {
+    if ($doc = $html->get('~/crmMailing/EditMailingCtrl/2step.html')) {
+      $doc->find('[ng-form="crmMailingSubform"]')
+        ->attr('cat-stevens', 'ts(\'wild world\')');
+    }
+  }
+
 }