[TeMPOraL]

They pivoted from "Luna Lang" (two words) to "Enso" (one word).

[yifanl]

I'm reasonably confident their original name is in the vein of https://www.rust-lang.org/, which no one refers to as Rust Lang :P

Whereas Enso is not a word to the best of my knowledge, or certainly not in common usage.

[nanomonkey]

Enso is a Zen Buddhism term (symbol?): https://en.wikipedia.org/wiki/Ens%C5%8D