This was actually a different issue.

Your issue was actually by design (DF wouldn't load incomplete language files, and the betas usually have new strings added), however, we're going to change this behaviour. It's definitely a pain to have to revert back to English during the betas, so we're going to make it so that new betas will still load the old language files, and it will just sub-in the English strings where needed.

I'll let you know when we've made those changes. In the meantime, I've attached the Swedish file for 5.0 Beta 1.

Thanks!

No problem

Just a quick update, starting with 5.0 Beta 2, the betas will now include even incomplete langs, and the English phrases will be subbed in automatically where needed.

Thanks!