Language is our passion; technology is our tool.

Leinhäuser Language Services is an international language service provider specializing in multilingual brand and corporate communications. Our team brings together cultures and languages from around the world and ensures your translation, localization, and adaptation projects will be successful – in your markets and for your target audiences.

Leinhäuser Language Services GmbH, based in Unterhaching near Munich, has been serving companies that need to communicate across language barriers since 1997. These include more than 25 DAX, MDAX, and Fortune 500 companies from the industrial, automotive, financial services, and technology sectors.

We are your partner throughout the entire value chain, offering specialized translation and proofreading, transcreation and copywriting, terminology management, audiovisual localization, interpreting, and international SEO. In cases where artificial intelligence is appropriate, we use it through our own portal, GATEWAYAI, which draws on your translation memories and terminology and is always reviewed by a human.

Where artificial intelligence is faster, we use it, and where a human is needed, we say so. We deliberately maintain transparency regarding this distinction because it determines liability, verifiability, and brand impact.

The difference rarely lies in a single translation, but rather in what gets built up over the years: consistent terminology, a translation memory tailored to your company’s language, and contacts who are familiar with your products. This is precisely the reason why many of our customer relationships have lasted for over a decade.

SERVICES

What does Leinhäuser translate and localize?

Leinhäuser translates and localizes the communications companies use to present themselves internationally. Our focus is on the texts where mistakes can be costly: regulatory publications, brand communications, and technical documentation.

We act as an extension of your team. By focusing on your goals and making strategic use of innovative technologies, we set new standards in quality and efficiency.

Specialized Teams

When even the best translation is no longer enough on its own, we offer additional expertise and specialized services from our Leinhäuser Studios. Do you need editing, AV localization, or terminology management? We’ll help you convey your message perfectly across all channels.

Leistungen

AUDITED, CERTIFIED, AND ORGANIZED

What do ISO 17100, ISO 9001, and TISAX stand for?

Leinhäuser operates in accordance with three certified standards, each of which ensures a different aspect. Quality management, optimized processes, and rigorously audited data security are not a matter of chance for us – they are verified by external parties.

CUSTOMERS

Who does Leinhäuser Language Services work for?

Leinhäuser serves more than 25 DAX, MDAX, and Fortune 500 companies, as well as numerous medium-sized market leaders. The company focuses primarily on the automotive, financial services, technology, and consumer goods sectors.

A common feature that defines our collaborations is duration: Many customer relationships have lasted for more than 10 years, and some for over 20 years. This is crucial for companies with recurring mandatory publications; their terminology and writing style has to remain consistent over the years and should not have to be redefined every time a service provider is changed.

New collaborations often begin with a specific project, such as a test translation or a single report, and grow from there. We expressly welcome comparisons with other providers.

Headergrafik im Leinhaeuser-Design, flache Illustration mit kräftigen Farben (KKClaimBlack)
Knorr Bremse
Kundenlogo Schleich

TESTIMONIALS

What do customers say about working with us?

Leinhäuser has been working with many customers for well over a decade. The following testimonials come from companies that have valued their partnership with Leinhäuser for many years.

Saia-Burgess Controls AG
Markus Baron v. Holtey
Head of MarCom
“Having worked with Leinhäuser for over 14 years, I sincerely appreciate the consistently outstanding collaboration and the high level of professionalism throughout this long-standing partnership. The combination of technical expertise and operational excellence delivers real value.”
Symrise
Dominik Rzepka
Director Corporate Communications
“Thank you for the great support and perfect collaboration on our year-end video. Despite the tight schedule, we were able to publish the videos with multilingual subtitles on time.”
USU AG
Sibylle Feith
Senior Marketing Specialist
“We chose Leinhäuser in 2008 after conducting extensive agency benchmarking with test translations. The technical knowledge of the translators in the IT sector and the text quality were the deciding factors in our decision. Our focus is primarily on marketing texts, some of which we need translated at fairly short notice. For this reason, reliability and punctuality are at least as important to us as the understanding of the respective target market. Leinhäuser has provided us with excellent service for years, and we value our trusting working relationship.”
Carl Hanser Verlag
Antje Bieber
Hanser Corporate
München
“Our working relationship with Leinhäuser is both uncomplicated and professional, with personal contacts, carefully crafted translations and on-time deliveries. As a publishing company, we frequently work with long and challenging texts, which include cultural history, children’s books and technical books. Leinhäuser always assembles the right team of specialists to carry out our projects. Leinhäuser also helps us extensively with marketing texts and the tricky job of translating book titles. The review process that Leinhäuser uses for translations is particularly important to us: Our books are aimed at an international audience—and so the translations must always read like originals.”
Siemens AG
Katja Wagner
Senior Communications Manager
EHS Deutschland
“For us, the name Leinhäuser is synonymous with high-quality journalistic style and reliability. The agency continuously manages to put our ideas to paper in a way that truly hits the mark, thereby making our jobs noticeably easier. On top of that, they’re fun to work with! Thank you so much for this collaborative partnership!”
Siemens AG
Katharina Hilpert
Head of Siemens financeTraining
“Leinhäuser Language Services (LLS) has been our trusted partner for all language topics since 2006. As a training department within Siemens AG [...] we need a language partner that is capable of processing a large number of topics and that can deal with finance topics of the highest complexity.”
LOWA Sportschuhe GmbH
Michael Frank
Head of Marketing
“The Cultural Insight project that we conducted with Leinhäuser provided some great feedback to us while we were doing our international campaign planning. We will now be able to work in an even more targeted manner in markets when the roll-out begins and perfectly communicate our messages.”
Tytex A/S
Tine Arhøj
CMO
“Leinhäuser Language Services GmbH is the best language service provider in the world! I knew that with you onboard, I would not fail my deadline, and I would have German content to be proud of.”
Mouser Electronics, Inc.
Ruggiero Lombardi
Translation Specialist
“DonnersTALK: The organization, the care shown to the participants, and the very interesting and exciting topics that were discussed were simply fantastic!”
Hamberger Flooring GmbH & Co. KG
Beate Benstetter
Referentin Export-Marketing
“The DonnersTALK events at Leinhäuser are truly enriching! In particular, the events on the exciting topic of AI have opened up completely new perspectives and provided valuable inspiration. Compact and competent, I’d join again in a heartbeat!”
Siemens Financial Services
Diana Maurer
Head of External & Partner
Engagement Communication
“DonnersTALK: I really enjoyed the event and had the opportunity to have in-depth discussions with numerous participants and to gather a wide range of perspectives and inspiration. The talks were very interesting and presented very expertly. All in all, it was a very successful event. Thank you so much!”

FAQs

Frequently Asked Questions for a Language Service Provider

Leinhäuser handles approximately 6,500 projects a year in 42 languages. The in-house team consists of 40 people from 9 countries, supplemented by a network of over 300 specialist linguists worldwide.

Leinhäuser is certified under ISO 17100 for translation services and under ISO 9001 for quality management, and holds the TISAX certification for information security in the automotive industry. In addition, the company has received an EcoVadis rating and has signed the UN Global Compact.

The Priority Lane is available for rush orders, even outside of German business hours. Inquiries sent to prioritylane@leinhaeuser.com will be confirmed immediately with details regarding acceptance, costs, and a binding delivery date.

Yes. Annual reports, management reports, and sustainability reports that align with CSRD and ESRS are among our key areas of focus. Terminology and figures are kept consistent across all language versions using translation memories and terminology databases.

Leinhäuser operates its own portal, GATEWAYAI, which generates AI translations using the translation memories and terminology databases of each client. The processing is GDPR-compliant, and human review can be enabled at any time.

KNOWLEDGE

Latest from our blog

Leinhäuser regularly publishes articles on international communication, localization, and AI-powered translation. Here is a selection of recently published articles:

COMPANY

  • International: A 40-person in-house team from 9 countries, including native English speakers as well as French, Italian, and Spanish colleagues
  • Global: A network of more than 300 of the best linguists from around the globe
  • On equal footing: Account Managers with linguistic training who work well under pressure to deliver top service and quality
  • Experienced: Using the latest technology since 1997—from CAT tools to AI, and adaptation to dubbing
  • High-performing: Approximately 6,500 projects in 42 languages per year, including work for more than 25 DAX, MDAX, and Fortune 500 companies