A really cool feature in Lync Client 2010 is the conversation translator. It uses Bing with Silverlight, and lets you chat with someone using a language you don´t master. It translates the conversation in real-time!
In the mean time, read this great blog post which explains how to enable the feature:
The translation function uses the Microsoft.Lync.Model.Conversation namespace from the Lync Model API to intercept instant messages and provide translation using Bing Web Services.
- The sample provides an example architecture for registering for and handling asynchronous Lync 2010 API events in Silverlight.
- Register for two Conversation related events: ParticipantAdded and InstantMessageReceived.
- Use the BeginSendMessage method and callback.
- Uses the Bing Translator Web Service.
More information at msdn