Sounds like the introduction of a Hattrick feature which, in my opinion, has been an unmitigated disaster since it was released over there.
Chats are great and good fun in theory, but don't work so well in practice. Especially where religious or national differences come into play. There are also legal aspects to chatrooms, especially involving minors and extra-especially anyone under the age of 13.
Chat would have to be moderated, which on a per game basis as in Hattrick is literally impossible. The only real way to do it, to make it a fun secure feature is to open country based chats and only during times that they can be moderated. Which would be asking a lot from volunteer workers. Asking users to moderate themselves, or giving them options to do so is possible - but IIRC legally a bit of a wobbly one.
I'll have a thunky .. but it's right down the list of things of things to think about atm.