Hi there,
As it seems only setting app is in English the most working solution to resolve this issue on Windows 10, is to remove and to re-add the display language.
You can also try this Start > Settings > Time & Language > Language > Spelling, typings, & keyboard settings > Advanced keyboard settings > Let me use a different input method for each app window.
This might be due to some corrupted registries. I suggest you to refer the below link on how to perform System File Checker and check if it helps.
Use the System File Checker tool to repair missing or corrupted system files
https://support.microsoft.com/en-us/topic/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system-files-79aa86cb-ca52-166a-92a3-966e85d4094e
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