How to store part of a project in a separate repository?

Question

git

Good day. There is a project that is maintained in a private repository. The project is divided into modules and each module has a localization file. The task is to separate these files into a separate repository for the translator. Those. when changing localization files, one could simply push the files to the repository with translations, and after the translator translates the files, get them back. At the same time, files with code do not get into the repository with translations.

Answer 1

git submodules.

Answer 2

As already written: git submodules
And also an alternative - git subtree.
Well, change the layout of the translations then. Here, either checkers, or go. Although, of course, you can still script bicycles, but these mechanisms have long been time-tested.