I feel your pain. I'm using a relatively unused programming language too.
You can answer general questions. It doesn't matter what language you're using for questions about preferred software, algorithms, etc. It's harder work to get points on these questions, (as they're applicable to everyone, tend to go to community status, and encourage bikeshedding), but it can be done.
You can push stackoverflow to other members of your community. Your particular programming language will have places on the web where users hang out, and you can tell those users to come over here.
You can do what the R guys did, and organise a [your language] flash mob. This is encouraged behaviour, and can help move a community over from wherever to this site.
For me - I'm pretty certain I can't get the questions and answers for my language moved from the forum they use over here. In this situation, you may have to accept that stackoverflow is not for you.