Is mirroring another person's speech a sign of interest?

Anonymous
It has been said that mirroring another person's body language could be a sign of interest. What about speech mirroring?

I notice he picks up on my catchphrases and re-uses them during conversations with me or with others.

He also tends to recall trivial things I had mentioned from conversations months ago - it always catches me by surprise because even I had forgotten about the things I've said.

So... either he has an excellent memory, or he is actually showing signs of interest?
Is mirroring another person's speech a sign of interest?
7 Opinion