Do you use "gem" in your conversation? Do you usually use a word of “gem” as a good person? Recently, I bought a book on survival English. I didn't notice it was American English conversation version. This time, I knew for the first time that they use "gem" as a good person. Is this a local or global English word? I think that, as well as Japanese has many intonations and slangs, English also has many. I hope to learn simple and global English, but I have a idea that languages are just a tool for communication and I need to adjust my words for others. If you are a native English speaker, how do you deal with this dialect issue? P.S. I'd found a funny comment on my Facebook before. It was SMS between my American friend and an Australian. Australian guy said "Corial"(I don't know the meaning either), and my friend sent back "Cordial?"... At last, he commented "Yes thats me, people of Australia I've never had Cordial, please send me some"