sometimes the plural of a word ending on 'us' ends on 'i'. Sometimes it does not. Even if the origin is Latin, it varies (lupus vs fructus). However when borrow

sometimes the plural of a word ending on 'us' ends on 'i'. Sometimes it does not. Even if the origin is Latin, it varies (lupus vs fructus). However when borrowing words from another language, things become interesting and subject to ignorance and fashion (not necessarily in that order). Pro tip: Pizza Pepperoni (Italy vs US)