I have been the web page that addresses the translations in Zorin Os 16. It shows that it is already translated in most of the major languages.
I remember that this was the last stage, in the case of Zorin Os 15, before releasing the stable version.
I imagine that, since it is very difficult to achieve the total translation to the languages that appear in this list, the stable version will still be released, isn't it?
I have been using various distro in Japanese language. The degree of translation greatly varies depends on the distro. It would be impossible to translate every single parts of OS in any case.