Coin Flip Question for Non-Americans

[RocketManJames]

Just out of curiousity, for those nations where their coins do not necessarily have a "head" on one side, do you use the term "heads or tails" when you do a coin flip?

Or, is there some standard way to determine which side is heads for all coins? Such as maybe using the side with the mint year as heads and other side as tails? Is there any standard for this?

-RMJ