Ask questions or just talk about different languages. Since BrainKing is an international game site supporting many languages, this board can be kind of useful.
Hrqls: I bet the Dutch 'g' and 'ch' can be quite tricky, huh? Same thing with the Czech 'i' vs. 'y' and 's' vs. 'z'. It seems to be almost impossible to find a Czech who would speak and especially write proper Czech. :)