I think the most important factor is what you're most comfortable with. In what language you can most easily just picture the right code in your mind without lo

I think the most important factor is what you're most comfortable with. In what language you can most easily just picture the right code in your mind without looking anything up or fiddling. For me, right now, that's JavaScript. I feel like I know almost ever dark corner of the language and I can just open a file and start typing. This doesn't include, though, any part of the ecosystem that requires a build step unfortunately (TypeScript, webpack, JSX). That configuration step is always a huge speed bump when trying to rapidly prototype an idea.