Question about the Na'vi language

[Crickett]

There are several reasons I have not attempted to learn how to speak or write Na'vi. The first and foremost is the utter failures at learning other languages that litters my past. Well, litter may be a bit extreme, but there are at least two major ones and one minor one.

But secondly, and this made it a non starter for me as soon as I heard Na'vi spoken for the first time......


Is it possible to speak conversational fluent Na'vi without the ability to roll your r's?