it's up to me; you're talking to me?
It's up to me to decide.
It's my turn to introduce you.
Et s'il y en a une, c'est à moi d'arranger ça.
And if there is one, it's up to me to sort it out.
— Volver (2006)
Am I the one who has to answer for it?
— Quand passent les cigognes (1957)
C'est à moi de m'occuper d'elle.
It's up to me to take care of her.
Pourquoi c'est à moi de le faire ?
Why is it up to me to do it?
C'est à moi d'aimer leur fric ou pas !
It's up to me whether I like their money or not!
— Les Lundis au soleil (2002)