body: I have extensive training in voice analysis and advanced degrees in linguistics -- but I wonder if I need a special certificate to serve as a forensic linguist on a court case e.g. performing accent recognition, speaker identification, etc. 
  
  
  Is this state-specific or is there a national-level or international-level certificate that would qualify me on a list of qualified experts available for legal service? 
  
  
  
title: What are the requirements to offer legal consult as a forensic linguist?