Chances are that Kindle Fire you purchased has English set as the default language. If you prefer to use it with a different language, changing it is easy. Languages other than English include Spanish, Italian, French, and Japanese. Here’s how to change the default language on the Kindle Fire HD.
Note: This article was written when the first-gen Fire Tablets were released. The steps on a modern tablet will vary.
Change Kindle Fire Default Language
Open up the notification bar by swiping from the top of the screen down, and tap More.
In the Settings menu select the “Language & Keyboard” category.
Tap the Device Language button.
Now all that’s left to do is select your preferred language. Once selected the Kindle Fire will immediately begin using the new language.