Assuming your OS language is setup to non-English language.

1. In Settings put "American English (en)" as a language.
2. Click SAVE and click Restart Now.
3. After wallet loads up, don't touch language settings, change the amount in Stake-split threshold for example, click SAVE and Restart Now.
4. Wallet will start up with the language that you use in your OS, although you didn't touch anything in wallet and decided to use American English prior to the first wallet restart.

Tested with Windows Server 2019.