One friend of mine never adds the plural to the word "chest". Like, "Boy, those are some big treasure chest!" It's the same thing with other words ending with t. "I'm trying to finish these quest." Then, one common between this friend and a few others is adding an extra "ed" to "Equiped". So, RPG sentences generally go like this:

"I'm trying to finish these quest. After beating one, I opened some treasure chest that had an item that I equipeded."

Grrr!

So, what are your friend's talking-quirks?