I just came across a great little free toolkit - the Microsoft Lync Adoption and Training Kit - which is a set of utilities and add-ins for Lync to give it increased capabilities - in addition to the instant messenger, video chat, phone calls and conference calling systems.
There's 'IM an expert' that allows you to search for people with specialist skills within your organisation (something that would probably be really helpful for HE researchers). But the one that struck me as really useful in education is the Conversation Translator, which does exactly that - two people can have a chat where they both type and see responses in their own language - and the Conversation Translator sits in the middle translating from one to the other - in a choice of 35 languages.
You could have students in Australia chatting to students in France - and build their confidence using the Conversation Translator, before weaning them off it as their language skills grow.
Learn More about the Lync Adoption and Training Kit