Language tag of tlh-qaak was not normalized

[winstonsung]

Describe the issue

We currently use lang_Script_REGION_variant format. tlh-qaak does not conform it as Qaak is a script subtag.

I already tried

• [X] I've read and searched the documentation.
• [X] I've searched for similar filed issues in this repository.

Steps to reproduce the behavior

Check languages.csv and other files

Expected behavior

No response

Screenshots

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Exception traceback

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Additional context

No response

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