I want to create a template which will have only the field "name".

Inside the "Template" ,i want to have a table/list with many templates and a button "create",to create a new template.something like this:

But the "en_US" ,fr_FR, es_ES to be in a list(like a tree view)with the associated message,and to have a button ,in case i want to add new language and text.I hope is clear,what I want!

Any ideas?Thank you in advance