Hello, thanks again.
I did what you suggested, but beside having 3 new lines in my menue nothing happened. No language change when I switch the language tab. So something is still missing.
You are right with your remark about the html code, but the name of this file is menue.php and not menue.html.
And it is not in the templates section but in the main section where you also find the global.php but no html files.
Maybe this is a mistake in the template itself.
But when I changed the name of the file after including your changes into menue.html and moved it to the templates part, I received several mistake warnings and the menue was gone in this part.
Now I am getting confused.