Please add Apatani Language for localisation.
Code set: 639-3
Eike Rathke committed a patch related to this issue.
It has been pushed to "master":
tdf#97386 add Apatani [apt-IN] to language list
It will be available in 5.2.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.