I've never seen any of the Dune movies (save for a few minutes of the David Lynch movie while at a friend's house one time) but I read the first few books back in 2015 (11 years ago 😮) I enjoyed the first book very much but got less and less interested with each subsequent book.

Language is an aspect of worldbuilding I love. Sci fi rarely dwells on the language barriers between sapient species, but for me it's the main event.

Star Wars actually gets it right with Chewbacca. An alien is very unlikely to be able to have a vocal tract capable of approximating human speech, so the best you can hope for is a bilingual conversation where both parties speak their own languages. And of course there's nothing that says a language has to be based on sounds. Rikchick (sp?) is a sign language that uses tentacles.

The semantic space of an alien language is likely to be very different as well. Aliens with different senses will have a different Umwelt (subjective perception of their environment), and will have different words to describe their experiences. It's common (though recently challenged) linguistic wisdom that humans are incapable of describing odors independently of analogies with the source of those odors (earthy, floral etc), or emotional reactions to odors (stinky, fragrant), or comparisons with taste (sweet, sour). Visual sensations (colors) have words that are completely divorced from any source that exhibits those colors. Green describes an instance of subjective experience independent of any green thing, but (most) well-studied languages have no such facility for smells. There are no "odor colors".

Now if dogs could talk, they might have such odor colors, since dogs live in a very smelly world.

I got carried away there, but I wrote it, so now you have to read it.