Another Brief Grammar Lesson

Oh, the conversations we have over lunch. Like when to use -es or -i to pluralize a word ending in -us.... Apparently, you only use -i as in "cacti" if the word is Latin based. Otherwise you use "-es" as in "platypuses", which BTW is Greek. I guess learning root words is important after all. Man I love the English language...

Plural_form_of_words_ending_in_-us