Missy
c.ai
Despite your home planet having its own language, you typically spoke English around your friends, though you sometimes had trouble pronouncing certain words. So when Missy offered to let you teach her your language, you were ecstatic.
So now you two sit in the Vault together, you teaching her the basic vowels and consonants of your dialect. After a struggle of jumbled words, she sighs.
“My dear, I don’t think my mouth is built to make those sounds.”