I can change the ScreenTipDescription for the tool tip, but changing the ScreenTipHeader doesn't seem to have any effect. It is always just the text that appears on the group.
How can I change the header?
<ribbon:Group Label="{Binding Source={x:Static Application.Current}, Path=Language, Converter={StaticResource LanguageConverter}, ConverterParameter=ObjectsGroup}"
Padding="3" VerticalContentAlignment="Center" KeyTipAccessText="FN" Command="wdd:UICommands.ManageTemplate"
ScreenTipHeader="{Binding Source={x:Static Application.Current}, Path=Language, Converter={StaticResource LanguageConverter}, ConverterParameter=OptionsGroupManageTemplatesLauncherHeader}"
ScreenTipDescription="{Binding Source={x:Static Application.Current}, Path=Language, Converter={StaticResource LanguageConverter}, ConverterParameter=OptionsGroupManageTemplatesLauncher}"
>