CM works very well — except for a small flaw:
At /wp-admin/nav-menus.php, under Menu Structure, one can set a Navigation Label which can differ from the site/post title. The Navigation Label for the additional languages will be displayed accordingly — but the NL for the original language will not work instead showing the title.
Example: http://kuku.5cz.de/test/en/decode/
The Navigation Label “ENGLAND” had been assigned. “GERMANY” and “FRANCE” work fine otherwise.
https://wordpress.org/plugins/ceceppa-multilingua/