I want to correct myself: redirect doesn't work in preview mode also
The functionality from the screenshot is available under ContentDetails.js file.
The language link is created using code:
var url = new dojo._Url(window.top.location.href); var contentLink = 111; var href = [url.scheme, "://", url.authority, url.path, "?language=", item.text, "#context=epi.cms.contentdata:///", contentLink].join("");
You need to pass contentLink value.
You could also use a server method from PageEditing class
I need to change page language when content mode is 'Edit'.
It should works as 'Language' functionallity from header panel.
Is it possible to duplicate this behaviour to my application?
I use redirect to new url and it works for preview and default modes.