une coïncidence
Tom said that it was just a coincidence.
Tom a dit que ce n’était qu’une coïncidence.
What a coincidence, running into one of his children!
Quelle coïncidence, tomber sur un de ses enfants !
— Central Station (1998)
I don't think that it's a coincidence.
Je ne pense pas que ce soit une coïncidence.
It was nothing but a coincidence.
Ce n’était qu’une coïncidence.
Do you think it's just a coincidence?
Tu penses que ce n’est qu’une coïncidence ?
That's probably just a coincidence.
Ce n’est probablement qu’une coïncidence.