CSOCurrent en:Broken/Fall Back Language for User Interface
Aus Cryptshare Documentation
The display language of Cryptshare for Outlook 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 add-in if there is no language pack present that matches the display language of MS Outlook. By default, Cryptshare for Outlook will use English as fallback language.