Some interpreters say they are “certified.” Is there a difference between qualified and certified interpreters?
A certified interpreter is an interpreter who is certified as competent by a professional organization or government entity through rigorous testing based on appropriate and consistent criteria. Interpreters who have had limited training or have taken a screening test administered by an employing health, interpreter or referral agency are not considered certified. Some programs offer a certificate of completion, but this does not equal certification.
A qualified interpreter is an individual who has been assessed for professional skills, demonstrates a high level of proficiency in at least two languages and has the appropriate training and experience to interpret with skill and accuracy while adhering to the National Code of Ethics and Standards of Practice published by the National Council on Interpreting in Health Care.
— Read on www.ncihc.org/faq-for-translators-and-interpreters