This document provides guidance on localizing Twitter for the Vietnamese market. It analyzes Vietnamese user behavior and preferences from platforms like Yahoo! 360 Blast. It identifies key features to include, such as SMS support to allow status updates anywhere and educating users on concepts like microblogging and showing off locations. Suggested actions include exploiting existing social networks for invites, focusing initially on entertainment and removing complex terms, and inviting influencers to help make the localized service spread virally.