This is more than just minor.
Developers can save alot of money by developing the game from the start with multiple languages, and release the game ONCE for the entire world, instead of having to get a secondary team later to do translations...and Nintendo can release a Jump Star game on the Wii with English translation already installed only in Japan, but importers can reap the benefit of the game still.
This could increase sales of all games for Wii world-wide. It is not a little thing...it is quite big.