Glossaries: The Underrated Feature That Saves You From Bad Translations

Ask any merchant who has bulk-translated a Shopify store into a new language and you'll hear the same story: most of it came out great, but a handful of words went sideways. A brand name got translated literally. A product code became a sentence. A technical term picked up a meaning from a completely different industry. The fix is boring, under-marketed, and takes about five minutes — it's called a glossary.

What Is a Translation Glossary?

A translation glossary is a short list that tells the translation engine: 'whenever you see this word, do this.' Either keep it untouched, replace it with a specific translation, or flag it for review. That's the whole feature. It sounds trivial. It is not — for most Shopify stores, a 30-line glossary prevents 80% of the embarrassing translation mistakes shoppers actually notice.

Why AI Alone Isn't Enough

Modern AI translation is remarkably good at sentences. It is less good at the stuff that isn't quite a sentence — brand names, SKUs, ingredient lists, model numbers, trademarked terms, industry-specific jargon. Without context, the model treats everything as translatable. So 'Apple' becomes 'Pomme' in French. 'Nike Air Max' becomes something involving atmospheric pressure. 'Crew neck' becomes 'cou d'équipage.' None of these are wrong in a language-theory sense. All of them are wrong for your store.

The Three Kinds of Words That Belong in Your Glossary

First: brand terms — your store name, product lines, proprietary ingredients, and anything you've trademarked. These should almost always stay in English (or stay in your source language). Second: industry jargon with multiple meanings. Think 'tank' in apparel versus 'tank' in automotive. A glossary pins it down. Third: culturally loaded phrases. Sometimes you want an English word to stay English because your customers recognize it. 'Vintage,' 'bestseller,' 'limited edition' — a Japanese shopper may know the English versions better than a direct translation.

A Quick Framework: What to Add First

Walk your top 20 product pages. Pull out every proper noun, every branded term, every acronym. That's your starting glossary — usually 30 to 80 entries. If you have a house style for translations (always call it 'tee' not 'T-shirt,' always use the British spelling, always keep color names in English), add those rules too. Glossaries compound: the larger and more specific yours gets, the more consistent every future translation will be.

Common Mistakes Merchants Make

The biggest one is waiting for the translation to finish before building the glossary. Build it first, then translate — otherwise you're fixing bad translations by hand one at a time, which defeats the point of bulk AI translation. The second mistake is over-glossing: every noun on the page does not need an entry. Only the ones AI gets wrong, or ones where consistency matters. Third: forgetting to update the glossary when you launch a new product line. Ten minutes once a month is enough.

Glossaries in Lokalize

Every Lokalize plan includes glossaries. Free gets you started, Pro bumps you to 50 entries, Premium to 500, and Business is unlimited. You add a term, optionally set a translation per target language, and every subsequent bulk translation respects it. No code, no manual hand-fixing — every string the app translates, including future ones, applies your rules automatically.

Do I Need a Different Glossary for Each Language?

One glossary, multiple language entries. For most terms, a single rule ('keep brand name X untranslated') applies across every language. For terms that need a specific translation per language ('Crew neck' → German, French, Japanese variants you've chosen), you set the per-language target translation in the same entry. You're not maintaining ten parallel glossaries — you're maintaining one glossary with up to ten translations per row.

How Big Should a Glossary Get?

For a niche store with a tight catalog, 30–80 entries is enough. For a multi-brand or multi-category retailer, expect to land somewhere between 200 and 500 entries — your brand house, your product lines, your top trademarked ingredients, and the handful of industry terms AI keeps getting wrong. Past about 500 entries, the marginal benefit drops fast; you're better off reviewing top pages by hand than glossing every edge case.

The Lazy Merchant's Starter Glossary

If you do nothing else this week: add your brand name. Add your three or four headline product lines. Add any trademarked ingredient or technology. Add your tagline. That's maybe eight entries. It will save you from the most embarrassing translation mistakes — the ones where your brand name ends up mistranslated on a checkout page — which is the exact mistake that makes shoppers back out of a purchase.