diff --git a/plugins/Sample/SamplePlugin.php b/plugins/Sample/SamplePlugin.php
index a0d1140f37..5c34d10bd1 100644
--- a/plugins/Sample/SamplePlugin.php
+++ b/plugins/Sample/SamplePlugin.php
@@ -265,9 +265,11 @@ class SamplePlugin extends Plugin
     {
         // common_local_url() gets the correct URL for the action name
         // we provide
-
         $action->menuItem(common_local_url('hello'),
-                          _m('Hello'), _m('A warm greeting'), false, 'nav_hello');
+                          // TRANS: Menu item in sample plugin.
+                          _m('Hello'),
+                          // TRANS: Menu item title in sample plugin.
+                          _m('A warm greeting'), false, 'nav_hello');
         return true;
     }
 
@@ -278,6 +280,7 @@ class SamplePlugin extends Plugin
                             'author' => 'Brion Vibber, Evan Prodromou',
                             'homepage' => 'http://status.net/wiki/Plugin:Sample',
                             'rawdescription' =>
+                          // TRANS: Plugin description.
                             _m('A sample plugin to show basics of development for new hackers.'));
         return true;
     }
diff --git a/plugins/Sample/User_greeting_count.php b/plugins/Sample/User_greeting_count.php
index 38d68c91ed..8128343d81 100644
--- a/plugins/Sample/User_greeting_count.php
+++ b/plugins/Sample/User_greeting_count.php
@@ -52,7 +52,6 @@ require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
  *
  * @see      DB_DataObject
  */
-
 class User_greeting_count extends Memcached_DataObject
 {
     public $__table = 'user_greeting_count'; // table name
@@ -68,7 +67,6 @@ class User_greeting_count extends Memcached_DataObject
      * @param mixed  $v Value to lookup
      *
      * @return User_greeting_count object found, or null for no hits
-     *
      */
     function staticGet($k, $v=null)
     {
@@ -150,7 +148,6 @@ class User_greeting_count extends Memcached_DataObject
         $gc = User_greeting_count::staticGet('user_id', $user_id);
 
         if (empty($gc)) {
-
             $gc = new User_greeting_count();
 
             $gc->user_id        = $user_id;
@@ -161,7 +158,7 @@ class User_greeting_count extends Memcached_DataObject
             if (!$result) {
                 // TRANS: Exception thrown when the user greeting count could not be saved in the database.
                 // TRANS: %d is a user ID (number).
-                throw Exception(sprintf(_m("Could not save new greeting count for %d."),
+                throw Exception(sprintf(_m('Could not save new greeting count for %d.'),
                                         $user_id));
             }
         } else {
@@ -174,7 +171,7 @@ class User_greeting_count extends Memcached_DataObject
             if (!$result) {
                 // TRANS: Exception thrown when the user greeting count could not be saved in the database.
                 // TRANS: %d is a user ID (number).
-                throw Exception(sprintf(_m("Could not increment greeting count for %d."),
+                throw Exception(sprintf(_m('Could not increment greeting count for %d.'),
                                         $user_id));
             }
         }
diff --git a/plugins/Sample/hello.php b/plugins/Sample/hello.php
index a793ac6de2..da5682b332 100644
--- a/plugins/Sample/hello.php
+++ b/plugins/Sample/hello.php
@@ -108,8 +108,10 @@ class HelloAction extends Action
     function title()
     {
         if (empty($this->user)) {
+            // TRANS: Page title for sample plugin.
             return _m('Hello');
         } else {
+            // TRANS: Page title for sample plugin. %s is a user nickname.
             return sprintf(_m('Hello, %s!'), $this->user->nickname);
         }
     }
@@ -130,11 +132,15 @@ class HelloAction extends Action
     {
         if (empty($this->user)) {
             $this->element('p', array('class' => 'greeting'),
+                           // TRANS: Message in sample plugin.
                            _m('Hello, stranger!'));
         } else {
             $this->element('p', array('class' => 'greeting'),
+                           // TRANS: Message in sample plugin. %s is a user nickname.
                            sprintf(_m('Hello, %s'), $this->user->nickname));
             $this->element('p', array('class' => 'greeting_count'),
+                           // TRANS: Message in sample plugin.
+                           // TRANS: %d is the number of times a user is greeted.
                            sprintf(_m('I have greeted you %d time.',
                                       'I have greeted you %d times.',
                                       $this->gc->greeting_count),