1. which is correct?
- They speak with a strong accent OR They speak with strong accents
2. What's the meaning of this phrase :
-Will you give me LEAVE to defer your raptures till I write again.
1. I prefer the second but the first also works for British English if we are referring to a specific group of people such as a class.
2. If you are asking about the meaning of the word you have capitalized, then LEAVE means permission in this sentence. If the sentence was written by a native spweaker then it could possibly be a little sarcastic.