Thread:Faenor of the Silver Laurel/@comment-26184570-20170123194515/@comment-26444332-20170123215256

They developed the language on their own. It's entirely possible, and probable, that in an infinite universe there are instances of two independently created yet identical objects, species, or in this case, languages.

Their writing system is different from the Japanese one, very much so: they don't use a pictographic style of written communication. Theirs could be likened to a harsher version of Elvish script, with more straight lines and angles. However, their cursive style of writing is somewhat similar.

And Eureka is right: no alien species would use Japanese for communication with outsiders a a whole. They would be more likely to use English, which, while technically a less common language than Spanish or Chinese, is known and used in every nation across the planet, due to its use as a trade language.