I wonder what the different aliens and alien concepts are called in different translations of the series.
Edit: Just running through the languages i have some familiarity with: Yeerks are "Yirks" in French and German, and "idoiter" in Swedish. "Chee" are "Cheys" in French, "Djee" in German, and "Chier" in Swedish. Unfortunately i'm not aware of any Chinese translation of the series or i'd check.