Cannot switch language to English
@DanikTheDoggo When you originally bought Sims 4, you received a language-locked version, and there's no way to switch to the global version without obtaining a new copy. For that, downloading from Steam once the game becomes free is your best bet. And yes, you can transfer your Origin-owned packs to a Steam install.
When you're ready, you'll need to uninstall the Origin version of Sims 4 and download the base game from Steam. Once it's installed, you'd then login to Origin and download your packs from there, and they'd work with the Steam base game. Keep in mind that you'll need to link your Steam and Origin accounts, if you haven't already, and run both launchers while you're playing Sims 4.
The only other step you'll want to take is to back up the Sims 4 folder in Documents > Electronic Arts. This folder contains your saves and other user data, and doesn't usually get deleted during the uninstall process. But it's always best to have a spare copy of this folder just in case something goes wrong. The contents of the folder, both saves and anything else you've created or downloaded, will work equally well in your Steam install as long as you download all the packs you currently use.
