title_body: In what ways are well-known a priori conlangs inadvertently eurocentric? It’s well-known that among inexperienced conlangers¹, many times their conlangs turn out to be way more European than intended, often showing features found only rarely outside of European languages, because the creator is not aware there was even an option. 
  
  What I’m curious now is whether among the “big names” such as Klingon, Na’vi, Dothraki etc. there are any such accidental Europeanisms? We can disregard Tolkien’s works as he was actively taking inspiration from various European languages (such as Welsh or Finnish²). Obviously auxlangs meant to suit primarily Europe can also be excluded, and whatever Esperanto is meant to be I’m well aware of the situation there, so you can exclude that from answers as well.
  
  
  
  ¹ Who are native speakers of an European language, i.e. statistically probably English.
  
  ² While not Indo-European, Finnish does share many features with other European languages.
upvoted_answer: While it's true that languages like Na'vi and Klingon (can't speak for Dothraki) do contain quite a few explicitly non-SAE (Standard Average European) features, it's worth noting that both Paul Frommer and Marc Okrand have stated that they were deliberately using less common and lesser-known features in their respective conlangs to make them sound more alien. Since avoiding features that would be considered common or familiar to their audiences (typically comprised of speakers of English and other SAE languages) was a goal during their language creation. I'd argue that deliberately avoiding all SAE features to make your language sound "strange" and "alien" is a sort of eurocentrism (though perhaps a less obvious sort than unthinkingly including all SAE features) in that your language ends up very influenced by European languages and their features.