Special characters such as umlaut in text box

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OS: Win10
PsychoPy version 2023.2.2:
Standard Standalone? (y/n) If not then what?: y
What are you trying to achieve?: Trying to enable participants to type responses that include special characters, such as umlaut (e.g: ö)

What did you try to make it work?:
I tried to change the locale to Deutsch (German). It did not work. When participants try to type the umlaut, it just does not appear and instead gives the " sign.

What specifically went wrong when you tried that?:
There was no error but the umlaut was still not recognized