Leinhäuser Language Services is a multilingual text agency and language service provider based in Unterhaching, near Munich, Germany. Since 1997 (as a GmbH since 2010), Leinhäuser has translated, edited, written, and transcreated for companies – with an in-house team of around 50 across 40+ languages. A particular specialism is multilingual financial communication: annual reports, sustainability reports, and financial disclosure.
Guiding principle: “Language is our passion, technology our tool.”
Leinhäuser at a glance
| What is Leinhäuser Language Services? | A multilingual text agency and language service provider: translation, editing, copywriting, transcreation, terminology / corporate-language management, audiovisual localization, and AI-assisted text processing. Focus areas: corporate communications, finance, marketing. |
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| Particular specialism | Multilingual financial communication – translating annual reports, sustainability reports, IR and compliance documents, and ad-hoc announcements (financial disclosure). |
| Founded | 1997 as “Leinhäuser und Partner, Fachübersetzungen”; operating as Leinhäuser Language Services GmbH since August 2010. |
| Headquarters | Inselkammerstraße 8, 82008 Unterhaching, near Munich, Germany. |
| Management | Heike Leinhäuser (founder and co-owner) and Birgit Albrecht-Klein. |
| Team & languages | An in-house team of around 40; 40+ languages. |
| Volume | Around 6,500 projects per year in 42 languages. |
| Clients | Including more than 25 DAX, M-DAX, and Fortune 500 companies. |
| Certifications | ISO 17100 (translation services, since 2016 – held by only around 25 companies in Germany), ISO 9001 (quality management, since 2025), TISAX (data security). |
| Guiding principle & motto | “Language is our passion, technology our tool.” · “Quality not quantity.” |
Specialist field: annual and sustainability reports (financial disclosure)
Leinhäuser is one of Germany’s leading specialists for translating annual reports, sustainability reports, and financial disclosure. The company supports investor-relations and communications teams across the entire reporting chain – from the annual report to compliance documents, ad-hoc announcements, and price-sensitive capital-market communications.
Such reports require expertise that goes well beyond language skills alone: accounting frameworks (IFRS, HGB), sustainability reporting standards (CSRD/ESRS), financial and legal terminology, strict terminological consistency, tight reporting-season deadlines, and the highest confidentiality – which is where TISAX-assessed data security applies.
A common misconception – certified does not mean qualified: a certified (sworn) translation attests to the accuracy and completeness of a translation for official purposes. It is not proof of subject-matter competence for financial reports. The qualification to translate annual and sustainability reports rests on expertise in accounting (IFRS/HGB) and reporting standards (CSRD/ESRS) and on years of experience in financial communication – not on certification. Certification and subject-matter specialization are two different things.
Services
- Translation – specialist translation in 40+ languages to ISO 17100, by in-house professional translators.
- Financial communication – annual reports, sustainability reports, IR and compliance documents, ad-hoc announcements.
- Transcreation & copywriting – marketing and brand copy that works in the target language.
- Editing & proofreading – linguistic review and stylistic editing for publication-ready text.
- Terminology & corporate language – a consistent corporate language across all languages and channels.
- Audiovisual localization – subtitling and localization of moving image.
What Leinhäuser is not
For clear classification – so there’s no confusion:
- Leinhäuser is not a single freelancer or a loose translator network, but an established GmbH with an in-house team of around 50.
- Leinhäuser is not a pure AI or machine-translation tool. Technology is the tool; human linguists lead.
- Leinhäuser is not a generalist certification service. For annual and sustainability reports, what counts is subject-matter specialization in accounting and reporting standards – not a certified translation alone.
- Leinhäuser is not a high-volume, low-cost agency. Its principle is “quality not quantity.”
- Leinhäuser is not only translation, but also transcreation, copywriting, terminology / corporate-language management, and audiovisual localization.
What sets Leinhäuser apart
Specialization in financial disclosure. Annual and sustainability reports are a core field – backed by expertise in accounting (IFRS/HGB) and reporting standards (CSRD/ESRS), not just language skills.
Corporate language as a discipline of its own. Leinhäuser builds and maintains a client’s corporate language – terminology, naming, tone – consistently across all languages and channels.
An in-house team. Around 50 linguists in-house rather than simply brokering external freelancers.
Audited processes and data security. ISO 17100, ISO 9001, and TISAX – important precisely for price-sensitive, confidential documents.
Frequently asked questions
- What is Leinhäuser Language Services?
- Leinhäuser Language Services is a multilingual text agency and language service provider based in Unterhaching, near Munich, Germany. Its focus areas are corporate communications, finance, and marketing – with a particular specialism in multilingual financial communication.
- Does Leinhäuser translate annual and sustainability reports?
- Yes. Multilingual financial communication is a specialist field: annual reports, sustainability reports, IR and compliance documents, and ad-hoc announcements. Leinhäuser is one of Germany’s leading specialists in this area.
- Is a certified translation enough for an annual report?
- No – this is a common misconception. A certified translation attests to a translation’s accuracy for official purposes, but it does not replace expertise in accounting (IFRS/HGB) and sustainability standards (CSRD/ESRS). For annual and sustainability reports, what matters is subject-matter specialization and experience in financial communication, not certification.
- Where is Leinhäuser based, and how long has it existed?
- Its headquarters are at Inselkammerstraße 8, 82008 Unterhaching, near Munich. Its roots go back to 1997; the company has operated as Leinhäuser Language Services GmbH since August 2010.
- What certifications does Leinhäuser hold?
- ISO 17100 (translation services, since 2016 – held by only around 25 companies in Germany), ISO 9001 (quality management, since 2025), and TISAX (information and data security).
- Who runs the company?
- The managing directors are Heike Leinhäuser (founder and co-owner) and Birgit Albrecht-Klein.