Hnuxhachi

Hnuxhachi is an extraterrestrial conlang created by Reddit user ThePinkTeenager for the conlang subreddit. It's spoken by a fictional society of semi-humanoid, four-armed aliens. The grammar is more or less set, but the lexicon is a neverending project. It includes clicks and invented sounds, and case marking is (mostly) done with prefixes.

Dipthongs
eɪ (ā)

Dictionary
You can visit the subreddit and see the language itself.

Number System
The numbering system is base-12.