It would be nice if the Firefox ebuild (and Mozilla's ebuild) would respect the LINGUAS variable that I have set in /etc/make.conf and download and install that language pack. Can you please do this ? Reproducible: Always Steps to Reproduce: 1. 2. 3.
This seems duplicate of bug 70820 (source-built firefox) or bug 69654 (binary).
*** This bug has been marked as a duplicate of 70820 ***