Besides the ones of the English language, that is.
From http://www.theyeshivaworld.com/coffeeroom/topic/rules-of-the-ywn-coffee-room-please-read
Use common sense.
All posts must be kept on topic.
Before starting a new topic do a quick check to see if the topic exists.
Please try to post in a language somewhat resembling English.
[Hebrew is not English.]
Please make sure to put that thread in the correct section of the coffee room.
[This rule has a long history of not being followed. There are only two non-default categories with a significant number of threads – Shidduchim and Bais Medrash.]
One user name per person. Period!
[Not so often, but it does happen.]
Please try to keep your comments short and to the point.