Exactly. To add to the illogicality of taking their Pokémon, I THINK - and now I could be wrong about this, so please forgive me if I seem rather n00bish here, but I THINK that they live in a world where travelling with Pokémon is a generally known & accepted practise.
I'm sure they're not the first trainers from Pokémon-Japan to go to Pokémon-America. Not to mention the existence of TV and what-not.
Also, I'm sure we're to just assume they live in a monolingual world?