The user has Norwegian (Nynorsk) set as his Windows display language.
After you mapped English to Norwegian (Nynorsk) following steps in Languages, the user selects Norwegian (Nynorsk) in his Workspace Preferences tool.
After Workspace Control Composer is refreshed, Workspace Preferences tool, Workspace notifications and other Workspace Control related settings will display in English while other Windows related features and apps will display in Norwegian.
After you mapped these two languages, the variable %LCID% will contain the Windows identifier of that language. You can then use this variable to make changes in the registry on language level. For example, if you change the registry using this variable, you can change the display language of Microsoft Office.