It ain't what they call you, it's what you answer to. Rectify a person each and every time he/she pronounce your name incorrectly. But, politely. As a matter of fact, some of them will remember you for their inability to pronounce it correctly. There can't be any better identity for an individual than his name. It becomes unique with a unique name. You already have hit that point of uniqueness.

The menu isn't the meal. Likewise, at the end of a day it's your work for which people will remember you or your name, not vice-versa. So, just sit back and enjoy your work. And, enjoy it more for you are unique like any other person.

Any which ways, language isn't in accordance with the truth of geographical limitation.