You can't change the language from within the game.
There are different language Pokemon games though, which exist in their own country. You could buy online by importing it if it's that important.
Chat with our AI personalities
You need a different region's game or to change your DS settings.
change the clock on your ds.
when you go in to your ds find the picture of a ds click it then go to the clock not the alarm and change it
Pokemon Platinum time runs on your DS or DSi clock. To make it nighttime in the game, change your clock settings too nighttime. Example: If you set it as midnight on your DS, it will be midnight in the game.
Pokemon diamond, Pokemon platinum and Pokemon pearl