Ethics questions are often the hardest part of interpreter exam prep, because the right answer depends on the situation, not on a glossary term. NBCMI's candidate handbook weights medical interpreter ethics at about 15% of its written exam, so check the handbook and code of the body you plan to test with. A good foundation for any of them is the National Council on Interpreting in Health Care (NCIHC) code and standards of practice, which are built on nine principles.
This guide takes each principle, gives you a short original scenario, and shows a Spanish line you might use. The scenarios are our own practice material, not exam questions.
Scripts to memorize first
Interpreters usually open with a short introduction. Practice it until it is automatic.
| Purpose | English | Spanish |
|---|---|---|
| Introduction | I am the interpreter. I will interpret everything that is said, and everything is confidential within the care team. | Soy el/la intérprete. Voy a interpretar todo lo que se diga, y todo es confidencial dentro del equipo de atención. |
| First person | I will interpret in the first person. When I say "I," I mean the person speaking. | Voy a interpretar en primera persona. Cuando yo diga "yo", me refiero a la persona que habla. |
| Clarification | The interpreter needs to ask for clarification. | El intérprete necesita pedir una aclaración. |
| Pause | The interpreter needs a moment to check a term. | El intérprete necesita un momento para revisar un término. |
The nine principles in practice
The order below follows the NCIHC Code of Ethics (July 2004). The National Standards of Practice (2005) list the same nine headings in a slightly different order and attach numbered standards to each.
1. Confidentiality
Principle: treat as confidential, within the treating team, what you learn in your duties, while observing disclosure requirements.
Scenario: you recognize the patient from your neighborhood. Later, a friend asks, "Was that Mrs. Ramírez at the clinic?"
Response: do not confirm or discuss anyone. A neutral line: "Lo siento, no puedo hablar sobre ningún paciente."
2. Accuracy
Principle: render the message accurately and completely, conveying the content and spirit of the original. The standards say not to add, omit or substitute, and to correct your own errors.
Scenario: a patient is angry and curses at the clinician. You feel the urge to soften it.
Response: interpret the content and tone as spoken. If you realize you made a mistake earlier, correct it as soon as you can: "Aclaración del intérprete: lo que dije antes fue incorrecto; la frase correcta es..."
3. Impartiality
Principle: refrain from counseling, advising or projecting personal biases. The standards also say to disclose potential conflicts of interest and withdraw if necessary.
Scenario: a family member asks you, "Usted, ¿qué haría?"
Response: "Soy el/la intérprete y no puedo dar opiniones. Puede preguntarle al médico." If you know the patient personally, tell the team before the session starts.
4. Role boundaries
Principle: maintain the boundaries of your role and refrain from personal involvement.
Scenario: at the end of the visit the patient asks for your phone number and a ride home.
Response: "Entiendo, pero mi trabajo es solo interpretar. Por favor, pídale ayuda al personal de la clínica."
5. Cultural awareness
Principle: develop awareness of the cultures you encounter. The standards say to alert all parties to a significant cultural misunderstanding.
Scenario: a patient says, "Me dan nervios." The clinician hears a mild word. In some communities "nervios" describes a wide range of distress and does not map onto one English term.
Response: interpret faithfully, then flag the gap openly: "Interpreter note: 'nervios' may carry a broader meaning than 'nervousness.' Would you like me to ask the patient to describe it?" Then ask the patient in Spanish: "El intérprete necesita pedir una aclaración: ¿puede explicar qué quiere decir con 'nervios'?"
6. Respect
Principle: treat all parties with respect. The standards encourage direct communication among all parties.
Scenario: the clinician says to you, "Tell her to take the medication." The patient looks at you instead of the clinician.
Response: interpret in the first person, keep your voice neutral, and gently re-direct eye contact by positioning yourself beside or slightly behind the patient, if the room allows.
7. Advocacy
Principle: NCIHC says an interpreter may be justified in acting as an advocate when a patient's health, well-being or dignity is at risk, and treats it as a narrow exception. The standards include speaking out to protect someone from serious harm.
Scenario: a patient is handed a form to sign and keeps saying, "No entiendo," while the staff hurries on.
Response: interpret what is said, then name what you observe in your role: "Interpreter note: the patient states they do not understand the form." Using the least intrusive step first fits the NCIHC approach. Follow your employer's policy if the problem continues.
8. Professional development
Principle: keep building your knowledge and skills, including seeking feedback.
Scenario: you are assigned to a genetics visit with terms you have not studied.
Response: prepare ahead when you can. If a term appears mid-session, pause rather than guess: "El intérprete necesita un momento para revisar un término." Disclosing a skill limit is itself a professional act.
9. Professionalism
Principle: act in a professional and ethical manner at all times. The standards include honest business practices and disclosing skill limitations for particular assignments.
Scenario: a coordinator asks you to describe yourself to a patient as "certified" when you have not earned a credential.
Response: describe only the qualifications you hold. This is our own example of the principle, not a named NCIHC rule.
How these show up on exams
Written ethics items usually ask what the interpreter should do when a principle is under pressure. Look for these signals in each answer choice:
- Does it keep the message complete and unaltered?
- Does it keep you neutral rather than helpful in a personal way?
- Does it keep the information inside the care team?
- Does it move the question to the right person, such as the clinician, supervisor or policy?
Oral exams add the same rules inside a role-play, so you must apply the principle while interpreting.
Study the scenarios in a structured way
The Spanish medical interpreter study guide pairs nine ethics principles with realistic scenarios and includes consecutive role-play scripts for partner practice, plus a 693-term glossary. It was designed by a family medicine physician & certified medical interpreter. It is an independent study aid, not training, and it is not affiliated with NCIHC, CCHI, NBCMI or IMIA. It does not guarantee any exam result or count toward required training hours. For a week-by-week plan, use the 6-week study plan, then see the interpreters page and the Medical Spanish collection.
Related guides
Study materials and phrase lists support learning and do not replace training, certification, or qualified interpreters in clinical care. This article is general education, not legal or career advice. We are not affiliated with, endorsed by or sponsored by NCIHC, CCHI or NBCMI; read the NCIHC code and standards themselves for the authoritative wording.