User blog comment:Akvii/Natlang vs. Conlang Discussion/@comment-1589986-20100426003801

True. However, realize it was the official national language of the Inca Empire for several years. It's the largest indigenous language of the Americas and is spoken from Ecuador to Bolivia, flawlessly. You gotta give the Peruvians some credit.

Yeah, I agree with the stuff on Esperanto. There are no irregularities, but some of it isn't perfect. Genders and stuff, like you said. Not to mention all the o's make it inefficient and repetetive-sounding. A perfect language might be Ithkuil.

If Quechua became the auxlang, yes it would be beaten up brutally. The phonology is small enough to give some trouble, especially with the three vowels, but not so bad as in China where the word for karaoke is kalaOK. Nevertheless, it would still be weird to say karauki for karaoke or tilibisyun or something like that for television.