Some of those sounds were phonemes. Considering how "alien" some of Earth languages sound to foreigners, non-Earth language could have even more strange sounds.
I suppose it's possible for her to learn to mimic those sounds, even if in some cases she must come up with different ways of producing them. There wouldn't be that many of them, but seeing how much trouble a "simple" R causes for speakers of languages that don't have R at all (eg. Cantonese), a language from another planet must have some "fun" too
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew