New user, some questions

Hi, i'm sorry for my bad english.
I'm a new user and i've some questions:

1. in 4.2 beta dynamic permissions create page only in english?
   
2. in 4.2 beta import page don't take layout and schema?
   
3. can i add a template action to default, so i can reuse it in more projects?
   
4. can i add a new "validate as" function to your list, so i can reuse it in more projects?
   
5. what's "plugin" folder? can i use it to extend PHPRunner?
   
6. where can i find more docs about code and smarty variables, methods, ...?
   Thanks,
   
   Achille