Act.User.set_language requires a locale string in the form en_GB.UTF-8. We were previously just providing the language and country in the form en_GB or sometimes just the language (e.g. ko).
This method is used in the installer to set the languages and locales correctly, so we should do the same here.
Fixes #90
Act.User.set_languagerequires a locale string in the formen_GB.UTF-8. We were previously just providing the language and country in the formen_GBor sometimes just the language (e.g.ko).This method is used in the installer to set the languages and locales correctly, so we should do the same here.