by the way
US /baɪ ðə weɪ/
UK /baɪ ðə weɪ/

1.
por cierto, a propósito
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?
Por cierto, ¿oíste lo del nuevo trabajo de Sarah?
•
I need to go to the store. By the way, do you need anything?
Necesito ir a la tienda. Por cierto, ¿necesitas algo?