6 Clinical Trial Translation and Localization Companies in 2026

A clinical trial translation service converts protocols, informed consent forms, patient-reported outcome instruments, and regulatory submissions into the languages a multi-country trial needs, work that has to hold up to both linguistic and regulatory scrutiny. This kind of regulatory document translation provider typically pairs certified human linguists with quality processes like back-translation and in-country review, and increasingly layers in AI-assisted translation technology to handle scale without sacrificing the accuracy regulators expect.

The clinical translation vendors below are listed in no particular order and each maintains a dedicated life sciences or healthcare translation practice rather than treating clinical content as one category among many. Between them, these companies and providers span the US, Ireland, the UK, and India, offering informed consent and protocol translation, regulatory submission localization, and multilingual patient-facing content.

AvantPage

AvantPage was founded in 1996 in Davis, California, and has built a dedicated Avantpage Life Sciences division specifically for pharmaceutical, biotech, medical device, and healthcare clients, distinct from the company's broader work translating for community clinics, state agencies, and the federal government. The company is a certified minority-owned and small-business enterprise, holding ISO 9001 and ISO 17100 translation-specific certifications, and expanded into the European market in 2017 to support life sciences clients navigating international regulatory requirements. Avantpage Life Sciences' services span clinical trial documentation, informed consent forms, study protocols, submission materials, and product labeling, aimed at keeping trials on schedule by ensuring documentation is culturally and linguistically appropriate for participants. In August 2025, the company was recognized as one of the Top 50 Fastest-Growing Companies in the Sacramento region by the Sacramento Business Journal.

CQfluency

CQfluency was founded in 2000 by Elisabete Miranda, a Brazilian immigrant to the US whose personal experience with a language and cultural misunderstanding that nearly led to unnecessary medical treatment for her daughter became the company's founding motivation. Headquartered in Hackensack, New Jersey with offices in Galway, Ireland and Barcelona, the company has been majority-owned by Ariel Alternatives, the private equity arm of Ariel Investments, since it acquired a 70 percent stake in 2023. CQfluency's life sciences practice covers translation of regulatory submissions including IND, NDA, MAA, and IMPD filings, multilingual MDR/IVDR compliance review, and compliant translation of protocols, consent forms, and trial documents for CROs running multi-country studies. In 2025, after 25 years leading the company, Miranda transitioned to the board, with healthcare executive Tameeka Smith stepping in as CEO to lead the company's next phase.

Knowledgeworks Innovative Linguistic Solutions

Knowledgeworks Innovative Linguistic Solutions was founded in 2001 in Bangalore by A. Gururaj, who set out to build a translation company with a global service footprint from its base in what the company calls the technology capital of India. The company serves clients across IT, manufacturing, healthcare, BFSI, and media sectors, and is part of the broader Valuepoint Group alongside co-founder Sampath Kumar's other ventures. Knowledgeworks applies a structured Translation, Editing, and Proofreading (TEP) workflow across more than 120 language pairs, drawing on ISO 9001:2015 certification and a globally distributed pool of domain-specific linguists for healthcare and medical content. The company's services extend beyond document translation into eLearning content development, multimedia localization, subtitling, and voiceover work for clients localizing training and educational materials alongside core documentation.

TransPerfect

TransPerfect was founded in 1992 by Phil Shawe and Liz Elting, who met in an NYU dorm room and built the business without external financing into what has become the largest privately held translation company in the US, with revenue exceeding $1 billion and thousands of employees worldwide. The company's ownership structure was settled through an unusually public legal battle: after years of internal disputes, a Delaware court ordered a sale of the business in 2016, and Shawe ultimately won a court-supervised auction to buy out Elting's 50 percent stake for roughly $385 million in 2018. TransPerfect Life Sciences operates as a dedicated division within the broader company, applying the firm's GlobalLink technology suite and ISO 9001 and 17100 certifications to translation and localization work for pharmaceutical, biotech, medical device, and clinical research clients. The company's client roster has included major financial institutions and pharmaceutical companies alongside consumer brands like Amazon and Walmart, reflecting its position as a general-purpose language services leader with a dedicated regulated-industries practice.

Vistatec

Vistatec was established in 1997 in Dublin, Ireland and has grown into a global localization and content services provider with a dedicated Life Sciences Division serving medical devices, healthcare software, clinical trials, biotechnology, mental health, pharmaceuticals, and applied science clients specifically. The company holds ISO 13485:2012 certification for medical device documentation alongside ISO 27001 for data security, and in January 2026 relocated its global headquarters to a new address within Dublin. In May 2026, Vistatec Life Sciences announced a partnership with Global Regulatory Writing & Consulting (GLOBAL) to combine regulatory writing expertise with Vistatec's localization capabilities for pharma and life sciences clients. The company was also a triple winner at the 2026 Noble Business Awards and won multiple 2026 Artificial Intelligence Excellence Awards for its AI-enabled localization technology, reflecting a broader push toward automation alongside its traditional human-translator model.

Wolfestone

Wolfestone was founded in 2006 in Swansea, Wales by entrepreneurs Roy Allkin and Anna Bastek, growing from a provider of small certificate translations into what the company describes as the largest language service provider in Wales. Allkin became the youngest-ever chair of the UK's Association of Translation Companies in 2010, and the company has continued expanding through acquisition, including Robertson Languages International in 2017, adding professional language training to its portfolio alongside its core translation and interpreting services. Wolfestone's industry-specialized services explicitly cover clinical trials translation alongside media, exporting, and other regulated sectors, delivered through dedicated account and project managers assigned to each client relationship. The company, now part of the broader Wolfestone Group alongside sister companies VoiceBox for multimedia localization and Robertson Languages for training, has grown to roughly 85 employees and has won multiple regional business awards for its growth and service quality.

Explore the full Translation Services landscape

The companies above represent a portion of a much larger field.

Diligent's platform includes over 70 Translation Services Vendors, many with Vendor qualification data available on demand. Book a demo to see the vendors and qualification reports available on the platform.

This article is intended as an informational overview of vendors operating in this space. Inclusion on this list does not constitute an endorsement, recommendation, or qualification by Diligent.