There is obviously a great diversity of languages here on Earth; about 6000. I imagine it's much more diverse in the cosmos. At any rate let me mention some of the topics relative to language that you will find here on this page.
I start off with what I find to be super fascinating information from Stan Tenen of the Meru Foundation at Meru.org about the origin of the Hebrew, Greek and Arabic languages but it would be deceiving to have you think that this is ALL these 8 videos by him are about. They actually take you into the geometry of language, a look at 'a personal' God and Creation itself. A different view on the seed of life and much more is also revealed. His work is only lightly gone into here but it is deep! Check him out.
After these Stand Tenen videos, I have a bunch of other, different cool videos that bring in different points about Language I wanted to make. Enjoy.