Re: Language change
@AlexandraSverige You have a couple of options here. One is to buy a physical copy of Sims 4 in Sweden or from a retailer in a region that receives the global version. You could also buy a product key online from a retailer that offers the global version, but be careful about third-party sites that may not offer a valid product. You could then register the key in Origin and have the global version of Sims 4.
I believe you might need to first contact EA customer support to remove the current version of the base game from your account, or else that version might override the new one and leave you stuck playing in Russian. But I have no way to test this.
The other option is to buy another copy of the base game through Steam. You could install the game through Steam and then download your Origin-owned packs: this is exactly how the Origin-Steam tie-in is supposed to work. The downside is that you'd need to run both Origin and Steam while you played. But this does work, according to another player in the same situation as you, since Steam would let you choose any supported language. And if it doesn't work, you can always get a refund from Steam provided you ask soon enough.
In any of these scenarios, your packs would remain on your account and work fine in whatever language you chose—the pack languages follow the base game.