This is not an uncommon situation, Ken. It is possible to live in a country, especially when working like you do, and not have much contact with the language. What you should do is bother to watch and read as widely as possible- move outside the areas you know and look into others. Read newspapers and magazines (online), so you get to know what people are reading around you in the US, etc.
PS Welcome to the forum.
Student or Learner