Just a couple of points.
As has been pointed out elsewhere in the thread, tribal =/= primitive.
Primitive also =/= socially and/or linguistically unsophisticated.
Modern languages that we are used to regarding as 'cultured' or 'sophisticated' are the direct, and in some cases practically unchanged, descendants of languages spoken by people living in mud huts.
On earth, just one planet compared to the many, many in the Eve universe, there is a massive variation between the 'sound' of languages, even if you limit the comparison to 'languages spoken by people not living 'modern' lifestyles. In fact, there's a massive variation on single continents, let alone between, say, Iwaidjan and Haida.