@bslobodin no, guessing locales is a super tricky thing.

I really do feel like this is an exceptional case. I’d rather set it to be 'sv-se' since the worst-case scenario there is that it will at least work, but might make the buyer guess some fields.

I’m going to see if I can also set this locale to be 'uk-en' or 'us-en' and see what happens. [These docs](http://developers.klarna.com/en/klarna-checkout/prepare-your-site-for-klarna-checkout) show an English-language screen but [this doc](http://developers.klarna.com/en/api-references-v1/klarna-checkout#supported_locales) does not mention English as being a supported locale.