Well maybe they are using "class" in the OOP sense, for instance if they're implementing a programming language. Even if they're not, if they use the word "class" in the specification for what they're implementing (maybe they're representing a taxonomical hierarchy in their program and have fields named "kingdom", "phylum", "class", etc), or have the word "class" in a user facing output (maybe they're making an RPG where a character object has fields "race", "class", "level").

It's confufing to use one name inside your code and different one elsewhere.