Foreign uppercase characters not recognized as such in signup form

[Raniz85]

Found a bug? Please fill out the sections below. 👍

Issue Summary

I tried signing up in the web interface with a password containing an uppercase Ö, and it didn't validate.

Steps to Reproduce

1. Sign up
2. Enter a 7 or more character long password containing lowercase ASCII characters, a digit, and a single uppercase Swedish letter (Å, Ä or Ö)
3. Password is not considered valid

Actual Results

Password is not considered valid

Expected Results

The password should be considered valid

Evidence

Uppercase A works:

Uppercase Å does not:

[dipak-kumawat]

I came across issue #17779 ("Foreign Uppercase Characters Not Recognized as Such in Signup Form") and would like to take ownership of resolving it.