Grant access to a single file on github

Question

I want to grant access to another developer to one single file in my git-repository. Is there any way except of submodules/subtrees?

It's just the localization-file which should be translated by an other person.

Answer 1

No, you cannot restrict access to single files on github.

You could either use a submodule or just have the other developer to send a pull request, if anything other than that file is changed you just reject it.