The problem is, you can\'t exactly expect everyone to play fairly.
Plus there\'s chances of mistranslations, the fact alot of rules depend on wording which would be quite different, and of course people using cards that aren\'t out in their country yet. For example, if a card says \"Evolves from Piloswine\", you could argue that someone with an \"Inomu\" card coult not evolve it into a Mamoswine. It\'s the same Pokemon, but technically that would not be considered the same Pokemon.