We usually don't write anything extra special. We usually leave a mix of spanish and english.
I know most of you know but for those who don't that might read this...We have been told that the staff require a note that also has your Name, date, RM#, and something like...this is a gift for you from____.
As some of you know as well we take post cards from where we live and write our notes on those. It is a little something to show where you live.