Contentement, nm : contentment, satisfaction, joy.

Son sourire éclatant montrait son contentement.
Her beaming smile showed her great contentment (or: satisfaction).

Elle sautillait de contentement à l’annonce de l’obtention de son diplôme.
She was jumping for joy at the news that she had passed her diploma.

Son contentement devant la réussite de ses enfants était évidente.
His content with his children’s success was obvious.