diff --git a/gajim/common/connection.py b/gajim/common/connection.py
index 99f8c1de6..9ed4dd03a 100644
--- a/gajim/common/connection.py
+++ b/gajim/common/connection.py
@@ -60,8 +60,9 @@ from gajim.common import passwords
 from gajim.common import idle
 from gajim.common import modules
 from gajim.common import ged
-from gajim.common.nec import NetworkEvent
+from gajim.common import i18n
 from gajim.common.i18n import _
+from gajim.common.nec import NetworkEvent
 from gajim.common.contacts import GC_Contact
 from gajim.common.connection_handlers import ConnectionHandlers
 from gajim.common.connection_handlers_events import OurShowEvent
@@ -1061,7 +1062,8 @@ class Connection(CommonConnection, ConnectionHandlers):
         con = nbxmpp.NonBlockingClient(
             domain=self._hostname,
             caller=self,
-            idlequeue=app.idlequeue)
+            idlequeue=app.idlequeue,
+            lang=i18n.LANG)
 
         if self._sm_resume_data:
             con.set_resume_data(self._sm_resume_data)
diff --git a/gajim/common/modules/muc.py b/gajim/common/modules/muc.py
index b02a44a8a..b4df57671 100644
--- a/gajim/common/modules/muc.py
+++ b/gajim/common/modules/muc.py
@@ -443,7 +443,7 @@ class MUC:
             return
 
         self._con.connection.get_module('MUC').request_config(
-            room_jid, i18n.LANG, callback=self._config_received)
+            room_jid, callback=self._config_received)
 
     def _config_received(self, result):
         if result.is_error: