Why we as an English teacher need to know about the differences between British English and American English?

Sorry, my Thai isn’t very good, so I’ll write in English and hope the Thai community can understand. I’m married to a Thai woman, and she often gets angry with me and starts argument

sorry for asking in English but i really want to know the meaning of สิงสาลาตาย I tried to search in dictionary buy It's not in the dictionary. I know the English name is 'goddess bless you from death