I was looking at the settings for the app, and decided to mess with the language settings.
After I switched to a certain language, my itch app looks like this:

All I could try was deleting app-xx.x.x and reinstalling, but no dice. Can anyone help me fix this?

I was able to fix this! I had to delete AppData/Roaming/itch/ and reinstall.
For devs looking into this, the language was "pt_BR".