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Kwintessential Kwintessential
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25 Years
experience
Your Global Communication Partner
Established in 2001, Kwintessential has built a reputation as a trusted provider of translation, interpreting, and localisation services. Our ISO 17100 and ISO 9001 certifications reflect our commitment to maintaining the highest standards of quality and consistency. We combine deep sector knowledge with a consultative approach to deliver tailored language solutions for clients across industries, including legal, marketing, technical, and business translation. Our global network of over 2,000 native-speaking linguists ensures culturally sensitive and accurate translations, while our London-based team prioritises fast turnarounds and exceptional service.

Clients such as American Express, HarperCollins, and Marks & Spencer rely on our expertise to bridge language gaps in courtrooms, boardrooms, and digital platforms. We pride ourselves on understanding client-specific requirements, ensuring translations align with terminology and style preferences through rigorous quality assurance processes. Our dedication to innovation and client-centric service has made us a partner of choice for organisations seeking global communication solutions.
Services
Translation Services Interpreting Services Localisation Services Certified Translation Technical Translation Legal Translation Marketing Translation Transcription Services Document Translation App Localisation
Details
  • Year established: 2001
Highlights and features
  • Bespoke language solutions tailored to your project requirements
  • ISO-certified quality assurance for translation accuracy
  • 24/7 support from experienced London-based project managers
  • Access to 2,000+ native-speaking linguists with sector expertise
  • Proven track record with global brands like American Express
Associations and certifications
  • ISO 17100
  • ISO 9001
What people say
Extremely happy with the interpreter
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Services
Translation Services
Professional translation across 200+ languages with ISO-certified quality. Our native linguists specialise in legal, technical, marketing, and business documents. Rigorous quality assurance ensures accuracy and cultural relevance for global clients.
Interpreting Services
Conference, court, and business interpreting with DPSI-qualified professionals. Available in-person or via telephone across 200+ languages. Expertise in legal, medical, and technical fields ensures precise real-time communication.
Localisation Services
Website, app, and marketing localisation tailored to regional markets. Combines linguistic accuracy with cultural insights to maintain brand integrity across global audiences. Includes DTP and transcreation services.
Certified Translation
Notarised and apostilled translations for legal, academic, and immigration purposes. ISO-certified process guarantees official recognition across 200+ languages with fast turnaround times.
Technical Translation
Precision translations for engineering, pharmaceutical, and technical documentation. Subject-matter experts ensure accurate terminology in safety-critical and regulatory contexts.
People
Not publicly listed
Senior Linguists
ISO 17100-certified translators with 10+ years' experience in legal and technical fields. Members of ITI and CIOL professional bodies.
Not publicly listed
Project Managers
Experienced in managing multilingual projects for global clients. Specialise in coordinating large-scale localisation and translation initiatives.
Questions
What is localisation in translation services?
Localisation adapts content beyond language, including cultural references, currency, and date formats, to suit specific regional markets.
How does localisation differ from translation?
Translation converts text between languages, while localisation adjusts cultural and functional elements for regional relevance.
Why is localisation important for businesses?
Effective localisation improves customer engagement, brand loyalty, and market penetration in international regions.
Can you provide certified translations?
Yes, we offer notarised, apostilled, and certified translations in 200+ languages with official recognition.
What quality standards do you follow?
We maintain ISO 17100 for translation services and ISO 9001 for quality management systems.
Reviews (4)
Svetlana Shem
Oct 11, 2018 Report
Thx for the effort! This is an invaluable resourse of language/cultural knowledge. Helps great deal both teachers and students.
Lrm &
Feb 08, 2017 Report
I ask the page about some traditions and culture of marraige in Colombia but page replied of no result ,, so what is wrong in question I meant if I like to marry awoman from Colombia what could I do to pay attention about . thank
Kimberly M. Hall
Dec 19, 2015 Report
I appreciate what u r doing here if we all would care enough to try and understand one another, instead of opposing differences this world would be an amazing place man could then truly be KIND. Thank you Peace all ways kim
Sherrie Long
Nov 28, 2014 Report
Very great information about different kinds of languages around the world it was a huge help in my learning skills.