While I was playing a correspondent game I was with my cursor in the chat environment and than I touched the right part of my mouse and by accident I clicked at “translate into English”.
Now all the comments are translated in English and also when I make a new comment in Dutch it is directly translated into English.
My suspicion is that this is done by your browser. If you’re using Chrome, and you right click on a page, there is a menu “translate to English”, and there will appear an icon on the right of the address bar. By clicking on that icon you can change language settings: