be a credit to
see under do credit to.
What Does It Mean To Be “Fluent” In A Language?We have all heard how differently people in London, New York, or Baton Rouge speak English, but are those different speakers still fluent in English? Where does accent stop and fluency begin?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.