I have been reading up on a lot of Technical Communication articles lately. Some (though not all) of the following articles address how to best approach writing for international audiences. Enjoy!
10 Tips for Writing International Technical Content by Michael Kriz
Color Meanings by Culture International Business Edge
10 Things You Can Do to Create Better Documentation by Alan Norton
Is “Intercultural” Communication a Moot Point? by Geoff Hart
Sensitivity to Other Cultures by Geoff Hart
The Periodic Table of SEO Ranking Factors Search Engine Land