I have a problem. On main server and localhost are the exacly the same files.
But in localhost I have messages in my home language, like
Pole Email je
Do you happen to have
...
in your web.config? This would automatically switch the culture of the site to suit the language passed via the browser request i.e. Accept-Language.
web.config
Accept-Language
If you want to force the language from the server just set enableClientBasedCulture to false.
enableClientBasedCulture
false