CSOCurrent en:Fall Back Language for User Interface
Aus Cryptshare Documentation
The display language of Cryptshare for Outlook (Classic) automatically adjusts itself to the display language of MS Outlook. However, this requires that a current language pack for that language is present.
You have the option to define a preferred fallback language out of the list of available languages. This language will be used by the Cryptshare for Outlook (Classic) add-in if there is no language pack present that matches the display language of MS Outlook. By default, Cryptshare for Outlook (Classic) will use English as fallback language.