Re: Language change not working

@EA_Leeuw Clearing the cache was unfortunately no help either. I've now accepted the fact that I need to reinstall the game, but now I've encountered a whole new issue: I can't uninstall! Clicking uninstall from Origin does absolutely nothing. Trying to uninstall through control panel prompts a confirmation window, and then a window asking permission for EA Installer Cleanup, and accepting is followed with exactly nothing. I tried uninstalling and reinstalling the Origin client, and still nothing... I'm at my wits' end with this!

@nynny44  Try using Revo Uninstaller to remove Sims 4, and Origin while you're at it.  Start by uninstalling Sims 4:

• Put aside your Sims 4 folder in Documents\Electronic Arts and rename it to something that doesn't include the words "Sims 4."
• Download Revo Uninstaller (the free version is fine) from here.
• Launch Revo, select Sims 4 from the list, and click Uninstall.
• Once the game is uninstalled, select "Moderate" under "scanning modes," and click Scan.
• Review the list, in case there's something you want to save; otherwise, click Select All, and then Delete.
• Close Revo, and restart your computer.

Next, uninstall Origin:

• First, clear Origin's cache.
• Quit Origin, then right-click on the Task Bar and open the Task Manager.  Scroll through looking for Origin entries.  If you find any, click on them and End Task.
• Launch Revo again and uninstall Origin, and when it's uninstalled, select "Moderate" again and Scan.
• If Revo finds any remaining registry entries, select all, delete, and click Next.
• Revo will display "Remaining Data and Folders.  Select all of them except for the "Origin Games" folder, if you have other games installed through Origin.  Delete the rest.
• Close Revo, and restart your computer.

Next, download the full Origin installer and run it.  Here's the direct download link:

http://download.dm.origin.com/origin/live/OriginSetup.exe

Be sure to run both the installer and Origin itself as an admin: right-click on each and select "Run as Administrator."  When it's reinstalled, download Sims 4; you can just download the base game, to save time, if you want.

Restart after installing and before playing, and allow the game to create a new user folder rather than putting back your existing one, at least for now.