google play - Android app support multiple languages

Question

If I want to upload my Android app with an aim of supporting multiple languages, do I have to upload multiple .apks, each designed for the language I would like to support, or do I implement it all into one .apk file?

Note: My app is a game and does not really not contain any Strings in the UI. The UI was made using Photoshop, eg the buttons with text and so on.

If I pack all the languages into one .apk file, how do I check which language the app should use?

Update:

All my images are stored in the assets folder of my project. How would I localize them?

Answer 1

No, you don't need to create multiple APKs, just single APK with Localization, see this http://developer.android.com/training/basics/supporting-devices/languages.html and this http://developer.android.com/guide/topics/resources/localization.html