Go to Settings/general/keyboard/international keyboards/add keyboard.
Select one and add it. Now, next time you wish to type something, when the iPad keyboard appears, you'll see a key with the icon of the world. Tap on it and on the tab key you'll see which language is selected, with that language the proper dictionary for auto correction is also selected.
Most of us around big centers are bilingual. I live about 50 miles from the US border and can see the green mountains of Vermont on a clear day. So I listen to PBS, CBS and ABC as a lot of people do here. Probably is the main way to learn another language, that and reading in the language an author writes...