Visual Studio causes problems to developers of add-ins in localized versions (as I blogged four years ago), but it is not the only one. The automation model of the VBA editor of Microsoft Office has also problems in localized versions. The CommandBar class has the Name and NameLocal properties for the English name and the localized name, but there are commandbars with its Name property localized (non-English) and others with its NameLocal property not localized (English). This poses a challenge to add-ins for the VBA editor when trying to get a commandbar by its (English) name:
BUG: CommandBar.Name property localized in VBA editor of Office.