Internationalization with XAML
I attended a session on internationalization and leared some very useful things about what's available in XAML. The most useful aspect for the typical applications I see was FlowDirection property which lets you easily switch from Left to Right to RtoL. This means that you can do English and Arabic websites and applications where the look is completely defined in XAML and can be changed to go from one direction to another with a simple property switch. Watch the session for more details and how double byte is now supported.
I know that most of the developers in our region work in both English and Arabic, remember there are lots of resources for internationalization best paractices already: