Data trigger check value of dynamic resource

Question

I have a WPF application and the content of should be displayed in German and English. Therefore, I created two seperate resource dictionaries which contain string snippets in each language. It is possible to switch between the languages while the application is running. At this point I got stuck at a problem. There are some settings the user can make. If the setting was completed successfully a message shows up. The text of the message is taken from the resource dictionary. Based on a success or error message the text is displayed green or red.

<TextBlock Text="{Binding UpdateTaxPercentageSettingsMessage}" FontWeight="Bold">
    <TextBlock.Style>
        <Style TargetType="{x:Type TextBlock}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{DynamicResource tax_percentage_update_went_wrong}">
                    <Setter Property="Foreground" Value="Red"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{StaticResource active_tax_law_update_went_wrong}">
                    <Setter Property="Foreground" Value="Red"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{StaticResource tax_percentage_was_updated_successfully}">
                    <Setter Property="Foreground" Value="Green"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{StaticResource active_tax_law_was_updated_successfully}">
                    <Setter Property="Foreground" Value="Green"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{StaticResource differential_taxation_info_update_went_wrong}">
                    <Setter Property="Foreground" Value="Red"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding UpdateTaxPercentageSettingsMessage}" Value="{StaticResource differential_taxation_info_was_updated_successfully}">
                    <Setter Property="Foreground" Value="Green"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBlock.Style>
</TextBlock>

To make switching languages possible while the application is running, the string snippets taken from the resource dictionary has to be a DynamicResource. Unfortunately, I can not use DynamicResources as condition in data triggers. Has anyone faced a similar problem yet? I am grateful for your suggestions!