This video demonstrates the localization of widgets. This is actually a W3C Widget P&C feature, not an MPEG-U widget feature.
Two players are started with different locales, and the clock widget is started in each to show the different processing (24h or AM/PM, language of the date).
Warning: the video is quite large, so you should be prepared to switch to 1080p and full screen to see anything.

[youtube]http://www.youtube.com/watch?v=SAKyT2PXibs[/youtube]