When a comment is posted in a document, it will be visible in that document for all languages and for all participants so in effect, different language teams can communicate. So for example, in a project where translation is required into French and Spanish, questions asked by the French team would be seen in the Spanish files as well as the responses. Multilingual team might ignore questions coming from other language teams but the project manager could enforce some communication protocols to facilitate communication between teams. For example, using @ or # symbols.