I’ve just updated an older answer of mine at: https://social.msdn.microsoft.com/Forums/vstudio/en-US/716ef041-0a59-4c1d-9519-e14db4de7e75/localizability-vs-localizable-attributes-in-control-dev?forum=wpf In case you’re wondering too what’s the difference between Localizable and Localizability attributes in .NET, maybe this helps a bit: ...