better error message for strange Unicode characters

[Johann150]

Describe the problem

My project "inherited" a Korean translation after a fork. The previous developers used another tool. When I tried importing the project into Weblate, there was an issue with the Korean translation file. My workaround was to exclude the Korean translation through the settings -> files -> language filter.

Today I figured out by chance that the file contained U+0008 (backspace) characters because file(1) said the file was "UTF-8 Unicode text, with overstriking". After removing these characters, Weblate could handle the file fine.

Describe the solution you'd like

The error message I got was very vague and unspecific:

Could not parse 1 matched file. locales/ko-KR.yml: 'ReaderError' object has no attribute 'message'.

Instead of this I would have liked a more specific error message. Ideally something like

Could not parse 1 matched file. locales/ko-KR.yml: Line 42 contains Unicode characters that Weblate cannot handle.

Describe alternatives you've considered

No response

Screenshots

No response

Additional context

The Korean translation file in question can be found here:

with overstriking (broken): https://akkoma.dev/FoundKeyGang/FoundKey/src/commit/87e1e658f2975fa07c1db7730b898047abaf4b63/locales/ko-KR.yml
without overstriking (fixed): https://akkoma.dev/FoundKeyGang/FoundKey/src/commit/7a94e9f2d5804b6331272cc5d9db2ff12d8fde05/locales/ko-KR.yml

[nijel]

This should be already fixed by translate/translate@e3e647f, please upgrade.

[github-actions]

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