How to Find and Vet a Patent Translator

Patent translation is specialist work — a mistranslated claim term can narrow your patent scope permanently or create prosecution complications that cost thousands to resolve. This guide covers how to find qualified patent translators and what to look for.

What Makes Patent Translation Different

Patent language is simultaneously technical, legal, and formulaic. A chemical patent claim in Japanese uses specific terminology conventions that differ from conversational Japanese. Chinese patent claims follow structural formats that general translators miss. Arabic technical patent vocabulary requires translators with both legal and engineering training. A general translator — even a highly skilled one — can produce translations that are linguistically correct but legally defective.

Where to Find Patent Translators

Patent law firms. Most international patent firms maintain networks of vetted translators in every language they prosecute. Ask your attorney for a referral.

Specialist translation agencies. Firms specialising in IP translation include RWS (now part of SDL/Tridion), Welocalize, TransPerfect IP, and regional specialists in each language.

Professional directories. The Institute of Translation and Interpreting (ITI, UK), the American Translators Association (ATA, US), and the Japan Patent Attorneys Association (JPAA) maintain directories of qualified patent translators.

Patent offices. Some patent offices maintain lists of authorised translators for national phase entry.

Vetting Questions

Does the translator have specific patent translation experience (not just legal or technical)? In which technology areas? How many patent specifications have they translated? Do they have references from patent attorneys? Can they demonstrate understanding of the specific claim terminology conventions in the target language?

Cost

Patent translation rates vary by language and complexity: $0.15–$0.30/word for common European languages, $0.20–$0.40/word for Japanese, Chinese, and Korean, and $0.25–$0.50/word for Arabic. A typical 30-page specification translates to 10,000–15,000 words — $2,000–$6,000 per language.

Sources

1. WIPO — Patent Translation Services — WIPO guidance on translation requirements for international patent filings
2. EPO — Patent Translate (Machine Translation) — EPO's neural machine translation tool for patent documents
3. WIPO PATENTSCOPE — WIPO Translate — WIPO's patent-specific machine translation covering multiple languages