French phrase
Tenez-moi ~.
Meaning
Keep me ___.
When to use it
A courteous request to receive ongoing updates. It suits both professional and everyday situations and is not strongly commanding.
Example dialogue
Tenez-moi au courant.
Keep me posted.
D'accord, je vous tiendrai informé dès que j'en saurai plus.
All right, I'll let you know as soon as I know more.