A GP surgery in west London books a twenty minute appointment for an Afghan patient with abdominal pain. The patient speaks Dari. Nobody at the practice does. The receptionist, meaning well, asks the patient's teenage nephew to stay in the room and help. Forty minutes later the consultation ends with advice about indigestion and a follow-up that never happens. What the patient actually said, in a sentence the nephew skipped because he was embarrassed, was that there had been blood.
That is the ordinary failure mode, and there is nothing exotic about it. It is what happens whenever a clinical conversation runs without a medical interpreter, and it happens most often in the language pairs nobody planned for.
What a Medical Interpreter Actually Does in the Room
The job is frequently misunderstood, including by the people booking it. A medical interpreter is not there to summarise, to soften, or to help the consultation move faster. The professional standard is to render everything that is said, in the first person, including the hesitations, the repetitions and the things the patient says that seem beside the point. Clinicians read pauses and self-corrections diagnostically. Strip them out and you have removed evidence.
The second part of the job is managing the places where two languages do not line up. When a patient describes pain with an idiom that has no English equivalent, the interpreter does not quietly pick the nearest word. They render it and then flag the ambiguity so the clinician can probe it. That habit of raising a query rather than making a judgement call is the single clearest marker of a trained interpreter, and it is what separates the role from ordinary bilingualism. The broader discipline, covered well in the overview of language interpretation, has spent decades formalising exactly this.
Why Dari and Pashto Coverage Is Thinner Than the Numbers Suggest
On paper both languages are well served. Dari and Pashto are spoken by tens of millions of people and there is no shortage of speakers in Britain. In practice, booking someone qualified for a hospital appointment on two days' notice is often impossible, and the reasons stack up.
Dialect is the first. Kabuli Dari and the Dari spoken around Herat diverge enough that clinical vocabulary can go astray, and the distance between Kandahari and northern Pashto is wider still. An agency that records only the language on the booking form is guessing. The second is gender. Many Afghan women will not discuss gynaecological or obstetric symptoms through a male interpreter, which halves an already small pool at exactly the moment accuracy matters most. The third is literacy. Services often assume a translated leaflet closes the gap, but a patient who reads neither Dari script nor English has not been informed of anything.
The Family Member Problem
Using relatives as interpreters is still common, and it is the practice that causes the most preventable harm. A family member has an interest in the outcome. They filter what is embarrassing, they answer questions themselves rather than passing them on, and they cannot be expected to relay a serious diagnosis accurately while hearing it for the first time. Children should never be doing it at all, a point NHS England makes plainly in its guidance for commissioners on interpreting and translation in primary care.
There is a safeguarding dimension too. If a patient is experiencing coercion or abuse at home, the person accompanying them to the appointment may be the last person who should be carrying their words.
A medical interpreter working in Dari and Pashto handles the spoken half of a much larger problem. The written half belongs to medical translation services that carry the same rigour into consent forms, prescriptions and discharge notes. Spoken and written language access have to be commissioned together to be worth anything.
Interpreting in Dari or Pashto depends on a human reading tone, hesitation and cultural context in real time, and no tool replaces that. What can be handed off is everything around the appointment: scheduling, matching, reminders and billing. Clinics that lean on ai automation for those steps free their interpreters to concentrate on the twenty minutes that actually matter.
Written Material Is a Different Job Entirely
Interpreting is live and spoken. Translating a consent form, a discharge summary or a medication schedule is written, reviewed and documented, and the two require different training. A first-rate interpreter may be a poor translator, and vice versa. Anyone commissioning both should read up on how medical translation is actually controlled, because the safeguards involved (back-translation, terminology locking, readability targets) have no equivalent in the interpreting booth.
The distinction gets finer still inside clinical research, where instruments completed by patients are validated as measurement tools rather than as prose. PoliLingua's explanation of why COA translation is not medical translation is a useful corrective for anyone who assumes one supplier covers everything.
When the Phone Is the Right Answer
Face to face is not always achievable and is not always necessary. For a rare language at short notice, phone interpreter services will usually beat an empty diary, and a competent interpreter on a speakerphone is better than a well-meaning nephew in the chair. Telephone works well for triage, for routine reviews and for anything short. It works badly when the clinician needs to read body language, when the news is serious, or when the patient is distressed. Video sits between the two and is worth the setup for planned appointments.
What Good Coverage Looks Like in Practice
Practices that get this right tend to do the same small things. They record language, dialect and gender preference on the patient record rather than rediscovering it each visit. They give the interpreter thirty seconds of context before the patient comes in. They speak to the patient rather than about them, in short segments, and they check understanding by asking the patient to explain the plan back rather than asking whether they understood. And they write in the notes that an interpreter was used, which is the only way the need ever shows up in commissioning data.
None of that is expensive. What is expensive is the appointment that achieved nothing, the missed diagnosis, and the patient who stops coming back because the last three visits went nowhere.