Add language alphabet test

We need a solution for when someone adds a translation with the wrong alphabet.

For example, an Hebrew translation must always be spelled using the [Hebrew alphabet](https://en.wikipedia.org/wiki/Hebrew_alphabet), and a German translation must be spelled using the [Latin alphabet](https://en.wikipedia.org/wiki/Latin_alphabet).

Please create a generic test or use an external library. (For instance, [this library](https://github.com/EliFinkelshteyn/alphabet-detector))

Thanks!

Start by locating the translation data and the repository's existing test setup. Evaluate whether a generic alphabet check or the linked alphabet-detector library can cover Hebrew and German examples. Done means the test detects translations written in an incorrect alphabet.

Written by the indexing model from the issue text.