diff --git a/addons/http_routing/controllers/main.py b/addons/http_routing/controllers/main.py
index b2677ec78a6..351d031f48d 100644
--- a/addons/http_routing/controllers/main.py
+++ b/addons/http_routing/controllers/main.py
@@ -14,7 +14,7 @@ class Routing(Home):
         IrHttp = request.env['ir.http'].sudo()
         modules = IrHttp.get_translation_frontend_modules()
         if mods:
-            modules += mods
+            modules += mods.split(',')
         return WebClient().translations(unique, mods=','.join(modules), lang=lang)