Hi Chouby,
Great plugin, and very intuitive to use!
I wondered if you have considered prepopulating new translated pages, i.e. when I click on the "Add new translation" plus sign, the title, text and custom fields would already be prepopulated with the contents of the default/previous language, as a reminder of what needs to be said in the newly created page... The Page Attributes (Parent, Template) are already prepopulated, which is very convenient!
All this could also be an optional Setting.