You need to consider certain areas when implementing Exchange 2010 in a global, heterogeneous, or multi-language environment. This section considers the most important factors of a global implementation: the language, time and message format, and message text encoding factors.
An important factor in international implementations to consider is the language for Exchange that should be installed. By default, Exchange Server 2010 only includes the English language for Exchange, but optionally you also can install additional language bundles.
If you install from the Exchange 2010 DVD, most of the language packs are automatically included.
Exchange 2010 comes with two different language ...