Court, hospital and USCIS interpreting across the US, matched to Hong Kong Cantonese or Taishanese, plus certified translation of Hong Kong and Guangdong records.
Prism Linguistics provides Cantonese interpreters for court hearings, depositions, hospital appointments and USCIS interviews anywhere in the United States, in person, by phone or by video, including speakers whose home variety is Taishanese, and certified English translation of Hong Kong and Guangdong civil records.
Last reviewed September 2, 2026 by Sarah J, Prism Linguistics
A request for a Chinese interpreter is a coin toss until someone asks two questions: Cantonese or Mandarin, and, for older speakers, Cantonese or Taishanese. Get either wrong and the appointment fails in the way that shows least, with a grandmother following most of it and missing the part that counts. Prism Linguistics assigns Cantonese interpreters nationwide from a single New York office, in person where the hearing or clinic is and by phone or video otherwise, and we settle the variety at intake rather than at the appointment.
Cantonese, or Taishanese? The Yue immigrants who founded the older Chinatowns came mostly from Taishan, and Taishanese is only marginally intelligible to a speaker of Hong Kong or Guangzhou Cantonese. A standard Cantonese interpreter will catch most of what an elderly Taishanese patient says and lose the rest, which is usually the part a doctor needs. So we ask at intake, and for the oldest speakers we try to send someone who grew up with the village dialect. The second split is with Mandarin: a Hong Kong speaker may have little of it, and booking a generic Chinese interpreter without asking is guesswork.
The Cantonese-speaking population sits mainly in the San Francisco Bay Area, the New York metro and Southern California, but the demand that reaches us is not tied to those neighbourhoods. It comes from the hospital and the courthouse, often in a town with no Chinatown at all, which is where a nationwide network of Cantonese interpreters earns its place.
Cantonese has an NCSC oral exam for court interpreters, and it is certified in California, Pennsylvania, Arkansas and Indiana; the Maine courts name Cantonese among the languages they are still short of. Tell us the court and the case type and we match what it will accept, whether a certified interpreter or, where no exam is run, a registered or qualified one. We take instructions from attorneys and the courts directly, and we are a private agency, not a court-appointed vendor.
Cantonese-speaking elders are the group most likely to be left with a grandchild translating a diagnosis, and that is exactly the arrangement a clinician cannot rely on. Any provider that takes federal funding must supply a Cantonese interpreter at no charge, and a family can ask for one. Video suits a consent conversation or a specialist consult. We send someone in person for discharge planning with an older patient, for a mental health assessment, or when a screen would sit badly between a frightened patient and the room. Where the patient is Taishanese, we tell the interpreter first.
At a naturalization or asylum interview the Cantonese interpreter renders exactly what is said, in the register it is said, and does not tidy a grandmother's answer into something more fluent. A smoothed answer is a changed answer, and the officer is listening for the applicant's own account. We brief for that, keep the interpreter neutral, and do not let a relative stand in. Where the interview comes with documents, we can handle their certified translation on the same booking.
Cantonese applicants bring two very different document sets. From Hong Kong come birth certificates and certified copies of a birth entry from the Immigration Department's Births Registry, marriage certificates and school and police records, most of them already bilingual, so the work is the Chinese-only portions, the chops and any handwritten amendment. From Guangdong and the wider mainland come the household register and a notarial birth certificate from the local Public Notary Office, printed in Simplified characters even though the family speaks Cantonese. There is no such thing as a document written in spoken Cantonese: a client asking for a Cantonese translation of a Hong Kong record is asking for a Traditional Chinese one.
The recurring snag is the name. A Hong Kong passport uses Hong Kong Government romanisation, so Cheung, Wong and Leung, while the same characters on a mainland relative's household register come out as Zhang, Huang and Liang in Pinyin, and USCIS reads two families where there is one. We spell each name to match the passport and record the other romanisation against the original. Each document is delivered with a signed Certificate of Translation Accuracy; the full service is at Cantonese translation services.
Tell us the date, the city and the setting, or send a clear scan of the document. We reply with a fixed price and, for interpreting, a named linguist. Call +1 (833) 282 8883, email info@prismlinguistics.com, or use the quote form and you will hear back within 60 minutes during business hours.
Our only office is in New York, and our Cantonese interpreters work nationwide. For in-person work we assign someone based in or near the city. These are the areas where Cantonese work is concentrated; the full list of 288 cities is below it.
Prism Linguistics is rated 4.6 out of 5 across 67 client reviews for its interpreting and translation work in the United States. That is the company-wide figure; we do not publish a separate rating per language because there is no honest way to measure one. If a Cantonese assignment ever falls short, tell us and we put it right.