Yeah, that shouldn't be a motivation, the point is to learn and practice, not find an easy way out.
That's not it, language are added one at a time because CG have to do default template for each language which can adapt to each puzzle to make a default input code. That and debugging, keeping the specific compiler up to date and stuff, so before adding a language, they try to see if it's popular, widely asked, new or useful.
That said, You both can propose any language you want, a good notice on how popular a language is on CG could be by how many like your proposition can raise.
Anyway, don't be intimidated by the skeptical, but defend your point of view so that outsiders can see why your language could be cool.