Rule #19 - Toast in the native language if you know the native language and have practiced the toast. Do not wing it

I would change this one to “be curious about a woman’s native culture without showing ignorance.” For example, a lot of guys who hit on Asian girls actually offend them by saying lines such as, “Where did you learn to speak English?”

A good way to not be ignorant is to study other cultures. Learn some basic words in different languages if you can – and make sure you can pronounce the words properly!
Smart Dating Rule: Be curious about other cultures without showing ignorance.