I'd like to know the obscure language too! DD wanted to take Latin this year, but we had a scheduling conflict.
Me too, please! I wonder whether it's one with an obscure alphabet or pictograms...if it is, the writing demands may not be that onerous in quantity, but challenging in quality. Though I think if he'd get auditing status, it might help the other kids (and their parents) accept him better, and he'd learn just the same. Possibly better than them. I recall trying to learn Spanish in evening classes with adults at the age of 13 or so, and having to quite after a couple years because even though some of the adults claimed to study an hour daily and I wen over the homework during ten minutes in the car if that much, there wasn't any noticeable progress by then.
Though if it's such a small class and such an obscure language, they might be all kids intrinsically competitive in linguistics, and it might turn out to be a great group...