@MarkHUK If it's really misunderstanding or language issue, i would suggest you to talk to him/her through PM using a translator. Both of you could mutually agree to solve it through active communication and importantly taking down the posts. If he/she isn't up for it, never mind. But i think you should try letting go of your feelings and think for your site and the users. He/she is just a colleague and nothing else. So you probably should avoid taking this hard.