How to localize the filter values in GridCheckBoxColumn in WPF DataGrid (SfDataGrid)?

<syncfusion:SfDataGrid x:Name="dataGrid"
                               AllowEditing="True"
                               AllowFiltering="True"
                               AllowGrouping="True"
                               AutoGenerateColumns="False"
                               ItemsSource="{Binding EmployeeDetails}"
                               ShowGroupDropArea="True">
            <syncfusion:SfDataGrid.Columns>
                <syncfusion:GridTextColumn MappingName="EmployeeName" />
                <syncfusion:GridTextColumn MappingName="EmployeeAge" />
                <syncfusion:GridTextColumn MappingName="EmployeeArea" />
                <syncfusion:GridTextColumn MappingName="EmployeeGender" />
                <syncfusion:GridTextColumn MappingName="ExperienceInMonth" />
                <syncfusion:GridCheckBoxColumn MappingName="Review" />
            </syncfusion:SfDataGrid.Columns>
</syncfusion:SfDataGrid>

public MainWindow()
{
    InitializeComponent();
    this.dataGrid.FilterItemsPopulated += grid_FilterItemsPopulated;
    this.dataGrid.FilterChanging += grid_FilterChanging;
}
 
void grid_FilterChanging(object sender, GridFilterEventArgs e)
{
    if (e.FilterPredicates == null || e.Column.MappingName != "Review" || e.FilterPredicates.Count == 0)
        return;
 
    //once the filter is applied, we need to change the filtervalue as original instead the changed value in filteritemspopulated event.
    if (e.FilterPredicates[0].FilterValue.Equals("Reviewed"))
        e.FilterPredicates[0].FilterValue = true;
    else if (e.FilterPredicates[0].FilterValue.Equals("NotReviewed"))
        e.FilterPredicates[0].FilterValue = false;
}
 
void grid_FilterItemsPopulated(object sender, GridFilterItemsPopulatedEventArgs e)
{
    if (e.Column.MappingName == "Review")
    {
        var itemsSource = e.ItemsSource as List<FilterElement>;
 
        //true changed into "Reviewed" and false changed into "NotReviewed" for localization.
        foreach (var element in itemsSource)
        {
            if (element.ActualValue.Equals(true))
                element.ActualValue = "Reviewed";
            else if (element.ActualValue.Equals(false))
                element.ActualValue = "NotReviewed";
        }
    }
}