A new version of zdmultilang has been released. You can read more on the official website.
I did look at the changes that do not jeopardize the work I had done arround the improvment of the widget support. However, I did a ‘diff’ of the 2 versions so I can provide a new file: zd_multilang with support for multilingual widgets.
This should supports installation on a v.1.2.2 or less version of zdmultilang.