pen pal
US /ˈpen pæl/
UK /ˈpen pæl/

1.
correspondant, correspondante
a person with whom one exchanges letters, especially regularly, but who is not a close friend
:
•
I've had a pen pal in Japan for five years.
J'ai un correspondant au Japon depuis cinq ans.
•
She enjoys writing to her pen pal about her daily life.
Elle aime écrire à son correspondant sur sa vie quotidienne.