I think I'm at a similar level as you, I can speak and write fluently but I suspect that I'm not always using the right words in the right context.
In my experience, the only way to really get a feel for that is to have conversations with native speakers. I had some native (Canadian, British) speaking colleagues in the past, at a time when I falsely believed that my English was near perfect, and it was amazing how much I noticed that I still had to learn.
Comments
I think I'm at a similar level as you, I can speak and write fluently but I suspect that I'm not always using the right words in the right context.
In my experience, the only way to really get a feel for that is to have conversations with native speakers. I had some native (Canadian, British) speaking colleagues in the past, at a time when I falsely believed that my English was near perfect, and it was amazing how much I noticed that I still had to learn.