SharePoint 2010 navigation with variations

I have created a site that consists of three site variations (EN, FR, ES) , but even though the site titles of the of variated sites are correct the top level navigation still shows the menu in English instead of the intended language.

I am using  the following navigation provider in my master page:

<div class="s4-notdlg" id="topnav">
		<!-- top navigation publishing data source -->
		<PublishingNavigation:PortalSiteMapDataSource
			ID="topSiteMap"
			runat="server"
			EnableViewState="false"
			SiteMapProvider="GlobalNavigation"
			StartFromCurrentNode="false"
			StartingNodeOffset="0"
			ShowStartingNode="false"
			TrimNonCurrentTypes="Heading"/>

		<!-- top navigation menu (set to use the new Simple Rendering) -->
		<SharePoint:AspMenu
		  ID="TopNavigationMenuV4"
		  EncodeTitle="false"
		  Runat="server"
		  EnableViewState="false"
		  DataSourceID="topSiteMap"
		  AccessKey="<%$Resources:wss,navigation_accesskey%>"
		  UseSimpleRendering="true"
		  UseSeparateCss="false"
		  Orientation="Horizontal"
		  StaticDisplayLevels="2"
		  MaximumDynamicDisplayLevels="0" 
		  SkipLinkText=""
		  CssClass="s4-tn">
		</SharePoint:AspMenu>	
		
</div>
	

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I have used the same nav provider in other projects using variations and it works the way it was designed to, but in this case not so much.

any help would be greatly appreciated.

Thanks.