Hi,
Try adding this in your user.config file:
<add key="Blog:BlogViewSuppressPageMenu" value="false"/>
if you want the menu in the blog edit page also add this:
<add key="Blog:EditPostSuppressPageMenu" value="false"/>
then touch Web.config to make it reload settings.
If you want to make the different language sections appear as different sites you might also be interested in the article Visual Partitioning
Hope that helps,
Joe