I suggest you start with the master branch. We usually don't add new languages to existing releases.
To start, pick something widely used such as pgscripts or psql.
Both files (pgscripts and psql) are completed.
What can you suggest to continue with?
Submit the files to redmine please.
Submitted
10beta1 is scheduled in about 2 weeks, so perhaps you could have something ready for that. I' curious if we handle the right-to-left direction properly.