Hello,
This is the language file for Taiwan, (traditional chinese) zh_tw.json and it's tested work.
The zh_tw.txt (please rename to zh_tw.json)
zh_tw.txt
file is for 1.15 and it's also work in 1.14 because 1.15 has 3 more lines than 1.14.
please include this into next release.
thank you.

I previously told you: Open a pull request.