Is there a way to distinguish "vegetarian" from "vegan" in Chinese?
Wikipedia distinguishes them like this:


  维根主义（英语：Veganism）


and


  素食主义（英语：vegetarianism）


维根 here is a transliterated loanword from English.



Wikipedia also offers the translation:


  纯素主义 


for veganism.



Although these words, may, work in their written forms - you might generally not be understood using these words colloquially, because nobody really talks like this. Better alternatives would be:


不吃肉 = vegetarianism
不吃动物(产)品 = veganism