Fix language selection on python3

cps/__init__.py

@@ -108,7 +108,7 @@ def create_app():
     return app
 
 @babel.localeselector
-def negociate_locale():
+def get_locale():
     # if a user is logged in, use the locale from the user settings
     user = getattr(g, 'user', None)
     # user = None
@@ -128,10 +128,6 @@ def negociate_locale():
     return negotiate_locale(preferred or ['en'], _BABEL_TRANSLATIONS)
 
 
-def get_locale():
-    return request._locale
-
-
 @babel.timezoneselector
 def get_timezone():
     user = getattr(g, 'user', None)