Modify the algorithm of get_language to extract only the primary language.

modules/plugin_dbui/helper.py

@@ -100,8 +100,8 @@ def get_js_files(server_path, client_path, directory):
 
 
 def get_language(environment):
-    """Helper method returning the application language.
-    The result is compliant with the ExtJS file name.
+    """Helper method returning the application language compliant with
+    the ExtJS local file name.
 
     The dictionary environment contains the keys request, response, 
     session, plugins, ....
@@ -109,8 +109,11 @@ def get_language(environment):
     """
     lg = environment['T'].accepted_language
     
-    if len(lg) == 5 and lg[0:2] == lg[3:5]: 
-        lg = lg[0:2]
+    # HTML tag for language: primary-dialect
+    # Extract the primary language and ignore dialect
+    m = re.match('([a-z]+)(\-([a-zA-Z]*))?', lg)
+    if m:
+        return m.group(1)
 
     return lg