How do I add the language switcher block to the header?

tamuren
I'd like the user to be able to change languages by clicking a language icon from the header, between the search button and the login button. How do I add language switching functionality to the header?
tamuren

I believe the answer is to

I believe the answer is to create a subtheme for Platon, then add platon--header.tpl.php to my subtheme and modify the header-user-tools div to have a child div referencing the language switcher. However, it is not clear what I would actually be adding to this div to enable the language switcher to appear. Could someone help please?