Quick question about the game (Na'vi Language/Canon)

[The Sojourner]

So, I'm a bit of an AVATAR fan (and have been since 2010), mostly of the language (lì'fya leNa'vi), and I got word that the developers of this game worked closely with Lightstorm Entertainment, the studio behind the movies, to ensure that every bit of flora and fauna (and perhaps some other things) are canon to the world of AVATAR. That, along with my linguistic interest, had me wondering: how much Na'vi is there in this game? Is it just names or are there whole phrases in Na'vi? Also, how much of it is spoken (e.g. in voice lines) vs. written (e.g. in UI/texts)?

I ask because given that this is an Ubisoft game that somehow made its way here to Steam, I have absolutely zero plans on purchasing this game unless a lot changes (and I highly doubt it ever will), and therefore I don't expect to find out firsthand.

Oe irayo sayeiyi to anyone who answers.