'someone' - yes, tell them to do one. A friend is different though and friendships can involve a bit of give and take.And this is the point exactly. If someone comes to you for advice and as a support, and then asks you to change the way you speak, surely you'd tell them to do one as well? That's what I would do anyway. If they want the advice and the correct terminology, then there are professionals more than happy to take their money for it.