We need to create a role that would:

• generally be only able to edit content in specific language (i.e fr-fr, regional author)
• except items based on template A where they also should be able to edit en version.

Does this seem feasible?

I tried creating one role that has language:write for French and another that is only able to edit items based on a template A + has language:write for en but a user that is member of those two is able to edit all en content.