John's questions

Ubuntu supports a number of different user interface languages (e.g. https://www.howtogeek.com/howto/17528/change-the-user-interface-language-in-ubuntu/). Where can I find the git (or other) repository storing the source code for these different language localization files?

I can't seem to find any git repositories containing ubuntu source code (I did find this link, http://archive.ubuntu.com/, but it doesn't appear to contain the original source code, but rather code processed for distribution). Though maybe the issue is that the Ubuntu language files are associated with an upstream project and I'm using the wrong search terms? Or maybe the issue is that there is no kind of web interface (e.g. Github) for viewing the Ubuntu source? Thanks!

Running Ubuntu 14.04 (Trusty), I have mounted an exFAT formatted USB drive. While attempting to git clone a repo onto it, I've run into the following error:

Cloning into 'rschedule'...
error: chmod on /media/john/John/apps/rschedule/.git/config.lock 
failed: Function not implemented
fatal: could not set 'core.filemode' to 'false'

Cloning the repo onto my computer's local file system works normally. I can also otherwise access the USB drive normally (i.e. read / create files).

Any ideas as to what may be going wrong?

Additional information which is hopefully irrelevant: Ubuntu is running on a Chromebook using crouton.

Edit:

A possibly related question: How do I use 'chmod' on an NTFS (or FAT32) partition?. Unfortunately, assuming it is related, I haven't been able to figure out how to translate that question / answers to my problem.