Major language acquisition theories

I need to write an article in the district-wide newsletter about second language fluency. I have determined that an interview with someone who is fluent in a second language would be a great way to deliver information in the article.

Create 10 questions inquiring how this person learned. Questions might include:
How old were you when you learned your second language? ) What was the biggest challenge? What learning strategies did you use?
Also help with a summary of how this person’s experiences correlate with the major language acquisition theories.