I live in a dorm, and one of my dorm mates was teasing me the other day, saying I was only allowed to write in the kitchen book in Danish (which presents no problems) and grammatically correct SerboCroatian. (He did not specify it had to make sense!) I thought it would be a fun gag to write somehting along the lines of
'Having been informed that SerboCroatian presents no problems for some members of this kitchen I would like it applied to all following information written here. While I feel that it will make misunderstandings easier, total immersion will ensure that this book either remains blank from now on, or we all learn a written language very quickly.'
It doesn't have to be that, if you want it phrased differently etc.
Also if someone thinks they know a proverb instead that I could write, it would be appreciated.