In my free time I sometimes translate works from one language to another (usually from English to Hindi or vice-versa). There are already many different ways of communicating the same idea in a single language. It is even more fascinating to see how you can state the same idea in a different language. Finding which translation best captures the essence of the idea is quite a task and makes try to truly understand what a given text is saying.
This also allows me to keep in touch with other languages given that English has been the medium of the education I have received from primary school through college.