Google has released official SEO Starter Guide in 40 language. This guide seems to be very useful for all webmasters.

List of the languages available:
* Arabic
* Bulgarian
* Catalan
* Chinese (Simplified)
* Chinese (Traditional)
* Croatian
* Czech
* Danish
* Dutch
* English
* English (GB)
* Filipino
* Finnish
* French
* German
* Greek
* Hebrew
* Hindi
* Hungarian
* Indonesian
* Italian
* Japanese
* Korean
* Latvian
* Lithuanian
* Norwegian
* Polish
* Portuguese (BR)
* Portuguese (PT)
* Romanian
* Russian
* Serbian
* Slovak
* Slovenian
* Spanish
* Swedish
* Thai
* Turkish
* Ukrainian
* Vietnamese

You can download and read more about guide from here:
http://googlewebmastercentral.blogspot.com/2009/06/seo-starter-guide-now-available-in-40.html