Your English is much better than my Swedish
The only language confirmed thus far is English. English has the benefit of being the most widely used language for the developer's target market, so it makes sense for it to be the primary language used. I could see the developers adding Swedish and any other languages that they can speak (if there are any). Other translations would require the services of a professional translator, and would therefore be further down the line.
It's already been established that real airlines are not going to feature in the game due to copyright issues, although the in game airline CLM has an obvious real world parallel. Adaptations of real airlines should be OK, but care should be taken (I wouldn't put anything that sounds like Etihad in the game as they can be quite protective of their branding).
@NastyGamer - I see what you did with SAS, but CAC becomes a rather unfortunate acronym here in the UK. There's potentially quite a big minefield here with words that accidentally have another meaning in other languages/dialects.