Your client sends back a translation with a note: “On page three you wrote ‘landlord,’ on page seven it’s ‘lessor,’ and on page twelve - ‘property owner.’ Are these three different concepts or the same thing?” You open the file, reread it, and realize - it’s the same thing. You just translated the document over three days and picked a different variant each time. Sound familiar? Then it’s time you got serious about terminology management.
What terminology management is and why every translator needs it¶
Terminology management is a system that helps you store, organize, and reuse terms across your translations. Think of it as your personal dictionary, but way smarter than a notebook or Excel spreadsheet.
Why is it critical? Three reasons.
First - consistency. When you’re translating a 50-page contract or a series of technical documents, the same term needs to be translated the same way everywhere. “Vermieter” is always “landlord” or always “lessor” - but not both in one document. Clients notice this, and it chips away at trust in your work.
Second - speed. Experienced translators confirm: when your termbase is set up and connected to a CAT tool, translation speed jumps 30-50%. You’re not spending time hunting for the right term - it pops up automatically.
Third - money. Fewer errors = fewer free revisions. Higher speed = more projects per month. And if you work with agencies, having your own termbase is a competitive edge that sets you apart from other freelancers.
Here’s the thing - ISO 17100, the international standard for translation services, explicitly requires translators to have a terminology management system. If you’re planning to work with serious agencies or corporate clients, a termbase isn’t “nice to have” - it’s a must-have.
How to build a termbase from scratch: step by step¶
Step 1: Mine terms from existing projects¶
Don’t start from a blank page. You already have dozens (maybe hundreds) of translated documents. Go through them and pull out terms that repeat.
For automated term extraction, there are specialized tools: - Sketch Engine - a corpus tool with a OneClick Terms feature that automatically extracts terms from texts. Starts at EUR 12/month for freelancers - MultiTerm Extract - free with your Trados Studio license - AntConc - completely free concordancer by Professor Laurence Anthony at Waseda University
If you don’t want to spend on tools - a plain Excel file works fine for getting started.
Step 2: Structure each entry properly¶
Not just “word - translation.” A good termbase entry contains:
| Field | Example |
|---|---|
| Source term | Vermieter |
| Approved translation | landlord |
| Definition | Person who rents out property to a tenant |
| Usage context | Rental agreements, correspondence with Hausverwaltung |
| Subject field | Real estate / Mietrecht |
| Notes | NOT “lessor” - too formal for general use |
| Status | Approved |
The more context you add, the more useful the database will be a year from now, when you can’t remember why you chose that particular variant.
Step 3: Organize by concepts, not words¶
This is the approach professional terminologists use. Instead of a flat list of “word A = translation B,” you group entries around concepts. One concept can have multiple terms in different languages, synonyms, and forbidden variants.
For example, the concept “tenant” might include: - DE: Mieter (approved), Mietpartei (acceptable) - EN: tenant (approved), lessee (formal, contracts only) - UK: орендар (approved), наймач (do not use)
Step 4: Integrate with your workflow¶
A termbase sitting in a separate file you never look at is useless. Connect it to your CAT tool so terms get highlighted automatically during translation.
In memoQ, it’s built in. In Trados - through MultiTerm. In OmegaT - through text glossaries. Setup takes 10-15 minutes, and it’ll save you hours.
Step 5: Maintain and update¶
Schedule a termbase review every 6-12 months. Remove outdated terms, add new ones, check everything’s still current. Language evolves, legislation changes, client requirements shift - your termbase needs to keep pace.
Tools: from free to professional¶
Free options¶
OmegaT - a free CAT tool with built-in glossary support. Format is a simple tab-delimited text file (UTF-8). Supports automatic term highlighting from the glossary during translation. Great for getting started.
AntConc - free concordancer for corpus analysis and term extraction. Doesn’t replace a termbase, but helps you fill one.
TermExcelerator - free plugin for Trados Studio from the RWS AppStore. Lets you connect a regular Excel spreadsheet as a terminology database.
Excel/Google Sheets - honestly, for a beginning translator with 2-3 specializations, this is enough. Create a spreadsheet with columns for term, translation, definition, context, and domain - and you’ve got a working system.
Built-in CAT tool solutions¶
Trados MultiTerm - the industry standard for terminology management. Included in Trados Studio subscriptions (from GBP 40/month). Standalone - GBP 295. Powerful, but has a learning curve.
memoQ - built-in termbase manager that works intuitively. memoQ translator pro subscription - EUR 40/month or EUR 360/year. Imports MultiTerm and TBX databases.
Phrase TMS - cloud-based solution with glossary management. From $24/month per user. Great for team collaboration.
Specialized tools¶
Sketch Engine - corpus tool for linguists and translators. Automatic term extraction, context analysis, parallel text comparison. From EUR 12/month for freelancers, from EUR 7/month for academic users.
InterpretBank - originally built for interpreters, but works great for translators too. EUR 10/month for freelancers or EUR 250 for a one-time license. Has a flashcard mode for studying terminology before a project.
Interpreters’ Help - online platform for glossary creation with term extraction from text. Free plan available.
Comparison table¶
| Tool | Price | Best for | Pros | Cons |
|---|---|---|---|---|
| Excel/Sheets | Free | Beginners | Simple, familiar | No CAT integration |
| OmegaT | Free | Freelancers | Full CAT + glossary | Basic format |
| TermExcelerator | Free | Trados users | Excel as termbase | Trados only |
| memoQ | EUR 40/mo | Freelancers, agencies | Intuitive, powerful | Price |
| MultiTerm | GBP 295 or subscription | Professionals | Industry standard | Complex UI |
| Sketch Engine | from EUR 12/mo | Linguists | Term extraction | Not a termbase itself |
| InterpretBank | EUR 10/mo | Interpreters | Flashcards, handy | Niche tool |
TBX: the standard you need to know¶
TBX (TermBase eXchange) is an XML format for exchanging terminology databases between different tools. Think of it as TMX for Translation Memory, but for terminology.
The current version is ISO 30042:2019, also known as TBX Version 3. It’s supported by virtually every professional CAT tool: Trados, memoQ, Phrase, Smartcat.
Why does this matter? If you’ve built a termbase in memoQ and then a client asks you to work in Trados - you export your database to TBX and import it into the new tool. No work lost.
There are two main TBX dialects: - TBX-Basic - for practical translation work, contains terms, definitions, notes - TBX-Min - minimal variant for simple databases
If you’re interested in standardizing your processes - knowing TBX is a plus when working with large clients and agencies.
Real cases: the cost of not managing terminology¶
On a translation forum, one translator shared this story: “I translated a series of legal documents for the same client over six months. Without a termbase. When the client compiled everything, it turned out I’d translated the same term five different ways. The client refused to pay for the last batch and never came back.”
There are bigger examples too. HSBC spent $10 million on rebranding in 2009 after their slogan “Assume Nothing” was translated as “Do Nothing” in several markets. A pharmaceutical company took millions in losses after a mistranslated dosage label led to adverse effects and product recalls - simply because nobody maintained a unified terminology database for medical terms.
For a freelancer the scale is smaller, but the principle’s the same. Inconsistent terminology means lost clients and a damaged reputation.
AI and terminology management: how they work together¶
With the rise of the MTPE approach (where AI creates a draft and you edit), the role of termbases has become even more important. Why? Because when you feed a text to ChatGPT or Claude without terminology instructions, you get different term choices every time.
The fix - feed your glossary as part of the prompt. Simple format: “Use the following terms: Vermieter = landlord, Mieter = tenant, Mietvertrag = rental agreement.” The AI model will stick to these terms, and all you need to check is context.
It works the other way too: some translators use AI to bootstrap their termbase. Upload a corpus of texts, ask the model to extract key terms with translations - and you get a draft that you then verify and clean up.
FAQ¶
How many terms should a translator’s termbase have?¶
That depends on your specialization. A legal translator working DE-EN can easily accumulate 500-1,000 terms in a year or two. Medical translators - even more. There’s no minimum or maximum. Start with at least 50-100 core terms in your niche and build from there. What matters is the quality of entries, not the quantity.
Can I use Google Sheets instead of specialized tools?¶
Yes, and many translators do, especially when starting out. Google Sheets is free, convenient, and always accessible. The downside - it doesn’t integrate with CAT tools automatically, so you’ll be searching for terms manually. Once your database grows past 300-500 terms, it makes sense to switch to a specialized tool or at least plug in TermExcelerator for Trados.
How do I transfer my termbase between different CAT tools?¶
Use the TBX (TermBase eXchange) format - it’s an open standard (ISO 30042) supported by virtually every professional CAT tool. Export from one tool as TBX, import into another. If your termbase is in Excel - most CAT tools can import .xlsx files directly too.
Is it worth buying MultiTerm separately?¶
If you’re already using Trados Studio on a subscription - MultiTerm is included, no need to buy separately. If you use a different CAT tool (like memoQ) - it has its own built-in termbase manager, and you don’t need MultiTerm. Buying MultiTerm standalone for GBP 295 only makes sense if you specifically need this tool for particular workflows.
How does a termbase help with machine translation post-editing?¶
Without a termbase, machine translation picks terms however it likes - and you spend time fixing them. With a termbase, you either feed the glossary into your AI prompt, or use your CAT tool’s QA features to check terminology consistency. Industry data shows that a proper termbase reduces Time to Edit (post-editing time) by 20-40%.