I really don't want to start a flame war, but answer #4 is, at the very least, Anglo-centric, if not *wrong*. To say that the high-encryption service pack is only available in English because "the US is an English speaking country" does a disservice to the many US citizens who may have a preference to speak, or do business, in another language. The government has relaxed the rules on exporting high-encryption software; if that were *not* the case, then why would the high-encryption pack be available for export? I quote from the site for the High-ensryption download site:
"Note: The High Encryption (128-bit) version of SP6a is eligible for export from the U.S. to all customers worldwide, except to U.S. embargoed destinations."
Why is the high-encryption service pack available only in English? My guess is that the impact on the *user interface* is negligible, making language-independent versions unnecessary...