Currently you can only make the complete Dynamic Zone or Component translatable. We are building a website, where the most part of our data will be constructed via Dynamic Zones. When translating an entry, all our components are erased and we have to build everything from the ground up again.
It would be perfect that when disabling the translation on the dynamic zone, the components inside it would then be translatable. This is currently a show stopper for us, since most of our content ist structured with Dynamic Zones.