French phrase
Parlez plus ~, s'il vous plaît.
Meaning
Please speak more ___.
When to use it
A polite request to reduce speaking speed. Common when fast speech is difficult to understand.
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'll speak more slowly.