I tried to batch process a Joomla 3.5.1 multisite with new menus to another language but failed to get the new language working for the new menus language.
I don’t know if this is only a bug https://issues.joomla.org/tracker/joomla-cms/10554 but it would be also nice if you had a selector for your installed languages to batch change languages for all menus.
What you think?