--- a/management/univention-management-console/src/univention/management/console/protocol/server.py	
+++ a/management/univention-management-console/src/univention/management/console/protocol/server.py	
@@ -207,6 +207,8 @@ def _handle(self, state, msg):
 				self._response(response, state)
 		elif msg.command == 'GET' and 'newsession' in msg.arguments:
 			CORE.info('Renewing session')
+			if state.processor:
+				state.locale = str(state.processor.locale)
 			state.processor = None
 			res = Response(msg)
 			res.status = SUCCESS
@@ -214,7 +216,8 @@ def _handle(self, state, msg):
 		else:
 			# inform processor
 			if not state.processor:
-				state.processor = Processor(**state.credentials())
+				state.processor = Processor(locale=state.locale, **state.credentials())
+				state.locale = None
 				state.processor.signal_connect('success', notifier.Callback(self._response, state))
 			state.processor.request(msg)
 
--- a/management/univention-management-console/src/univention/management/console/protocol/session.py	
+++ a/management/univention-management-console/src/univention/management/console/protocol/session.py	
@@ -94,6 +94,7 @@ def __init__(self, client, socket):
 		self.socket = socket
 		self.processor = None
 		self.authenticated = False
+		self.locale = None
 		self.__credentials = None
 		self.buffer = ''
 		self.requests = {}
@@ -214,7 +215,7 @@ class Processor(Base):
 	:param str password: password of the user
 	"""
 
-	def __init__(self, username, password, auth_type):
+	def __init__(self, username, password, auth_type, locale=None):
 		Base.__init__(self, 'univention-management-console')
 		self.set_credentials(username, password, auth_type)
 
@@ -235,6 +236,9 @@ def __init__(self, username, password, auth_type):
 		self._reload_acls_and_permitted_commands()
 
 		self.signal_new('response')
+		if locale:
+			self.set_language(locale)
+			self.i18n.set_locale(locale)
 
 	def set_credentials(self, username, password, auth_type):
 		self.username = username