To reproduce: 1.Add a RadGridView with one column. 2.Select the form and in the Properties window, set the form's Localizable property to true. 3.Specify the column's HeaderText for the default language. 4.Set the form's Language property to French (France). 5.Specify the column's HeaderText for French (France). 6.Set the CurrentUICulture before the InitializeComponent method to "fr-FR". If you run the application, the column is localized as expected. 7.If you get back to the designer and change the form's Language property back to Default you will notice that the column's HeaderText disappears. Workaround: set the HeaderText programmatically according to the current language.