Hello Charlie,
for commercial use of the API, please send a license request to mtlic at microsoft dot com. Any personally identifiable information is removed before any logs are written, and only members of the engineering and quality assurance teams of Microsoft Translator
have access to a portion of the logs, for defect investigation and quality assurance resp.
Microsoft Translator is an online service. The API supports SSL in order to provide security on the wire.
Chris Wendt
Microsoft Translator