I was going to apply to contribute to this project through Incubator. Catalan is not there... yet!!!
There have been a few native Basque speakers (4 that i know of, now that you've applied) who've applied for the course. Possibly more. Now i think we just need to put more pressure on Duolingo to agree to let us make the course :)
And i don't think they generally notify you until they've decided to actually create the course. Hopefully you'll get a notification one of these days :)
Click on other and write Catalan in. When they start the course, provided that they accept your application, they will notify you (Note: It helps your chances of getting accepted if you are an active user of Duolingo). Thanks for applying to help bring the language to Duolingo!
Good luck applying, I'm really looking forward to an eventual Catalan course.