by the way

US /baɪ ðə weɪ/
UK /baɪ ðə weɪ/
"by the way" picture
1.

au fait, à propos

used to introduce a topic or information that is not directly related to the current conversation but is considered relevant or interesting

:
By the way, did you hear about Sarah's new job?
Au fait, as-tu entendu parler du nouveau travail de Sarah ?
I need to go to the store. By the way, do you need anything?
Je dois aller au magasin. Au fait, as-tu besoin de quelque chose ?