<Application x:Class="Button.RotatedProgress.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:md="http://materialdesigninxaml.net/winfx/xaml/themes" ... > <Application.Resources> <ResourceDictionary> ... <Style x:Key="{x:Static md:Spelling.IgnoreAllMenuItemStyleKey}" TargetType="{x:Type MenuItem}" BasedOn="{StaticResource MaterialDesignMenuItem}"> <!--Change this to whatever is appropriate to for your application--> <Setter Property="Header" Value="Localized Ignore All" /> </Style> <Style x:Key="{x:Static md:Spelling.NoSuggestionsMenuItemStyleKey}" TargetType="{x:Type MenuItem}" BasedOn="{StaticResource MaterialDesignMenuItem}"> <!--Change this to whatever is appropriate to for your application--> <Setter Property="Header" Value="Localized (no spelling suggestions)" /> <Setter Property="IsEnabled" Value="False" /> </Style> </ResourceDictionary> </Application.Resources> </Application>