My 3 year daughter who use to love her aunty and her people suddenly started hurting them orally

A. Orally as in you are saying that the child is using foul language or something because of that is happening you need to check with your child that where is your child learning all these things from and what all words does your child use you have to keep correcting your child that is going to be something which is very important and then only you can regularly do counselling and positive these people are nice they’re so friendly you should not be bad with them