fallback to UTF8 version of locale before failing

app/controller/controller.php

@@ -58,7 +58,11 @@ class Controller
         putenv("LANGUAGE=".$lang);
 
         if (!setlocale(LC_ALL, $lang)) {
-            echo "<!-- setlocale $lang failed -->";
+            // try the UTF8 version
+            putenv("LC_MESSAGES=".$lang.".utf8");
+            putenv("LANG=".$lang.".utf8");
+            putenv("LANGUAGE=".$lang.".utf8");
+            if (!setlocale(LC_ALL, $lang.".utf8")) echo "<!-- setlocale $lang failed -->";
         }
 
         if (!textdomain("messages")) {