After patching/installing a pack all new interactions
This issue is caused by a problem where the language file does not get updated properly when patching.
The language file can be found here: <Installation Path>\The Sims 4\Data\Client\Strings_ENG_US.package (ENG_US may differ depending on your language).
Check on the date. It should have a date around the time of the latest patch release. If that file is not current, the strings to be displayed are missing, hence the codes.
If your file has the correct date, this issue can also be caused by mods. Make sure they are up-to-date or remove them.
There are several options to solve this issue but not all of them work for all people. Try them from top to bottom.
Only works if you have more than one language available
These steps are for PC only.
- Backup your user files
- Delete the following files from your hard drive: <Installation Path>\The Sims 4\Game\Bin\TS4.exe and TS4_64.exe. If you have known extensions hidden, it will be just TS4 and TS4_64.
- Go to the Origin My Games library
The Sims 4 game tile will change from Play to Download
- Start the Download
Origin may prompt you for what language to install in. If it does, make sure to choose the same language you originally installed The Sims 4 in.
- Reinstall the game
How to prevent
- It might help to set the Origin client to the same language as the game.