On the 30th of November I went the Biwug sessions about SharePoint 2010 Multilingual User Interface. It were very interesting sessions that gave a good overview of variations, language packs, resource files, …
Based on what I heard in this sessions, I wanted to make a small addition related to the branding process and MUI.
When you create master pages or page layouts, you can create content specific HTML blocks. These language specific content blocks can easily be created with a SharePoint Control called: LanguageSpecificContent.
A container control that renders content conditionally based on the language code of the current Web site (SPWeb). MSDN
This means that the control checks the language in which the site has initially been created. So nothing will happen when the language gets changed from within the user context menu. But this solution can be used when you have a publishing site with language variations enabled.
To use this SharePoint Control, the following assembly needs to be registered on your master page or page layout (this is referenced by default).
The next step is to create your language specific content, this can be done as follows.
In the Languages attribute you could specify the language code (locale identifier: LCID). You can insert your language specific content between the ContentTemplate tags.
On an English site you get this:
On a Dutch site you get this: