French phrase
Parlez plus lentement, s'il vous plaît.
Meaning
Please speak more slowly.
When to use it
A polite request to reduce speaking speed. It is used when speech is difficult to follow and sounds direct but courteous.
Example dialogue
Parlez plus lentement, s'il vous plaît.
Please speak more slowly.
Oui, bien sûr. Je vais parler plus lentement.
Yes, of course. I will speak more slowly.