In French we have liaisons, where in basically every word ending with an s followed by a word starting with a vowel, the s is pronounced “z”. For instance, mes amis (my friends) is pronounced “mez amis” instead of “meh amis”, des oiseaux (some birds) is “dez oiseaux” and not “deh oiseaux”. One of the many things that makes French hard to learn for foreigners.