Probably out of the scope of this PR, but eventually I think it might be useful to have a separate translation-tools repo where to put tools that can be shared by different translation projects.
If the tools are in a separate repo, it is also not necessary to create a hidden dir that is not easily discoverable (using _scripts might be a better option, unless it interferes with something).

Originally posted by @ezio-melotti in #378 (review)