Add one template to each templates group by a query ?
 

what is the query to run for adding one template to each templates group that i use ?

There is no such query, but there is at least 1 hack that lets you do that.

i try this :
INSERT INTO template (templateid, templatesetid, title, template) VALUES ('', '-1', 'template_name', 'text');

it works but maybe it's not the better way

That's an option but I don't recommed doing that since all default templates (templatesetid = -1) are deleted when you upgrade.

ok
it's not a problem for me i don't upgrade and i wait huge version for doing this.
French template and hacks are not easy to upgrade :D