Index: discuss.php
===================================================================
RCS file: /cvsroot/moodle/moodle/mod/forum/discuss.php,v
retrieving revision 1.95.2.10
diff -u -r1.95.2.10 discuss.php
--- discuss.php	7 Dec 2007 00:45:06 -0000	1.95.2.10
+++ discuss.php	12 Jan 2009 06:00:10 -0000
@@ -28,9 +28,11 @@
     if (!$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id)) {
         error('Course Module ID was incorrect');
     }
+
+    require_course_login($course, true, $cm);
+
     // move this down fix for MDL-6926
     require_once("lib.php");
-    require_course_login($course, true, $cm);
 
     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
     $canviewdiscussion = has_capability('mod/forum:viewdiscussion', $modcontext);
Index: post.php
===================================================================
RCS file: /cvsroot/moodle/moodle/mod/forum/post.php,v
retrieving revision 1.134.2.17
diff -u -r1.134.2.17 post.php
--- post.php	16 Nov 2008 22:47:54 -0000	1.134.2.17
+++ post.php	12 Jan 2009 06:00:10 -0000
@@ -4,7 +4,6 @@
 
     require_once('../../config.php');
     require_once('lib.php');
-    require_once('post_form.php');
 
     $reply   = optional_param('reply', 0, PARAM_INT);
     $forum   = optional_param('forum', 0, PARAM_INT);
@@ -146,6 +145,9 @@
             error("Incorrect cm");
         }
 
+        // call course_setup to use forced language, MDL-6926 
+        course_setup($course->id);
+
         $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
         $modcontext    = get_context_instance(CONTEXT_MODULE, $cm->id);
 
@@ -444,11 +446,14 @@
     }
     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
 
+    // setup course variable to force form language
+    // fix for MDL-6926
+    course_setup($course->id);
+    require_once('post_form.php');
     $mform_post = new mod_forum_post_form('post.php', array('course'=>$course, 'coursecontext'=>$coursecontext, 'modcontext'=>$modcontext, 'forum'=>$forum, 'post'=>$post));
 
     if ($fromform = $mform_post->get_data()) {
 
-
         require_login($course, false, $cm);
 
         if (empty($SESSION->fromurl)) {
Index: view.php
===================================================================
RCS file: /cvsroot/moodle/moodle/mod/forum/view.php,v
retrieving revision 1.94.2.4
diff -u -r1.94.2.4 view.php
--- view.php	15 May 2007 18:27:01 -0000	1.94.2.4
+++ view.php	12 Jan 2009 06:00:11 -0000
@@ -26,6 +26,11 @@
         if (! $forum = get_record("forum", "id", $cm->instance)) {
             error("Forum ID was incorrect");
         }
+
+        // move require_course_login here to use forced language for course
+        // fix for MDL-6926
+        require_course_login($course, true, $cm);
+
         $strforums = get_string("modulenameplural", "forum");
         $strforum = get_string("modulename", "forum");
         $buttontext = update_module_button($cm->id, $course->id, $strforum);
@@ -39,9 +44,6 @@
             error("Forum is misconfigured - don't know what course it's from");
         }
 
-        $strforums = get_string("modulenameplural", "forum");
-        $strforum = get_string("modulename", "forum");
-
         if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
             $buttontext = update_module_button($cm->id, $course->id, $strforum);
         } else {
@@ -51,6 +53,13 @@
             $buttontext = "";
         }
 
+        // move require_course_login here to use forced language for course
+        // fix for MDL-6926
+        require_course_login($course, true, $cm);
+
+        $strforums = get_string("modulenameplural", "forum");
+        $strforum = get_string("modulename", "forum");
+
     } else {
         error('Must specify a course module or a forum ID');
     }
@@ -60,7 +69,7 @@
     }
 
 
-    require_course_login($course, true, $cm);
+
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);