Mmhmm. Still there's a difference between have trouble pronouncing and 'think they have trouble pronouncing', as witness those who think Japanese or Hindi names are difficult. Fantasy names with randomly inserted apostrophes put me off something terrible until I realized they had no phonic function, they were there, manga aesthetics-ly, only because they looked purty.

Culsans and Tuntle however are fine even in English, and even obey the fantasy rule that Liquids Are Good.