idatziko didazu berehala, ez da hala?: ¿me escribirás pronto, verdad?
n'est-ce pas ?
(esaldiaren amaieran, aurretik esan dena indartzeko) expression used to ask for confirmation of what has just been stated; isn't it?; don't you?; aren't you?; won't you?
idatziko didazu, ez da hala?: you will write to me, won't you?