Change Language for Ribbon Items

Sep 23, 2013 at 3:12 PM
I am unable to change language for header of RibbonTabItem, RibbonGroupBox and menu items in the ribbon. It always picks strings from en-US resource files. Rest of the application is working as intended. Is there something I am doing wrong.
<Fluent:Ribbon Name="ribbonMain" ShowQuickAccessToolBarAboveRibbon="True" IsQuickAccessToolBarVisible="False">
                    <Fluent:Ribbon.QuickAccessItems></Fluent:Ribbon.QuickAccessItems>
                    <Fluent:RibbonTabItem Fluent:KeyTip.Keys="F" Name="tabFile" Tag="File" Header="{x:Static res:Strings.Main_FileManu}" >
                        <Fluent:RibbonGroupBox Fluent:KeyTip.Keys="SC" Header="{x:Static res:Strings.Main_grpSetup}">
                            <Fluent:Button Fluent:KeyTip.Keys="D" Name="btnDistributorMenu" MinHeight="67" Header="{x:Static res:Strings.DistributorMenu}" Icon="Images/distributor.gif" LargeIcon="Images/distributor.gif">
                                <Fluent:Button.ToolTip>
                                    <Fluent:ScreenTip Title="{x:Static res:Strings.DistributorMenu}" Width ="250" Image="Images/distributor.gif"
                                    Text="{x:Static res:Strings.Main_DisText}"/>
                                </Fluent:Button.ToolTip>
                            </Fluent:Button>
                            <Fluent:Button Fluent:KeyTip.Keys="CG" Name="btnConfigurationMenu" MinHeight="67" Header="{x:Static res:Strings.ConfigurationMenu}" Icon="Images/configuration.gif" LargeIcon="Images/configuration.gif">
                                <Fluent:Button.ToolTip>
                                    <Fluent:ScreenTip Title="{x:Static res:Strings.ConfigurationMenu}" Width ="250" Image="Images/configuration.gif"
                                    Text="{x:Static res:Strings.Main_ConfigText}"
                                    DisableReason="This message can display the reason why Configuration is disabled."/>
                                </Fluent:Button.ToolTip>
                            </Fluent:Button>
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