Start with the language your customers actually use
A shopper may look for a jumper while your catalog calls the same item a sweater. A bilingual store can also receive Italian queries for products described in English. A synonym group gives you a short, explicit list of terms to review together. Choose clothing, colors, materials or sizes, then select the languages your store serves. The generator filters a small, inspectable dictionary; it does not read your catalog or use an AI service to invent associations.
The result is a starting worksheet, not a recommended configuration for every store. Read every group against your products and real search terms before using it. Some words have several meanings: an Italian abito might describe an outfit rather than the dress you sell, and leather terminology can vary between collections. Delete terms that do not describe the same products. For a single language, groups with fewer than two distinct terms are omitted.
Treat sizes and collisions carefully
Selecting IT, EU, US or UK adds aliases within that named sizing system. It does not convert a size from one country to another. Numeric sizes vary by brand, garment and intended fit, so the generator never equates IT 40 with a US or UK size. Letter groups such as M and medium are flagged because a one-letter query can also be an initial or a product code. The tool checks duplicate terms inside this generated set; it cannot see collisions with groups already saved in your store.
Copy, review and test before rollout
Use Copy beside a group to keep its terms together, or download the CSV for review with your team. The CSV is a worksheet, not a verified native Shopify import file. Shopify documentation has changed, and synonym controls may not be available in every current Search & Discovery interface. Check your app first. Where the controls exist, enter the terms in a synonym group and test representative queries. The generator conservatively applies the documented legacy limits: twenty terms per group, five words per term and one thousand terms across the store.
Synonyms address chosen vocabulary differences. They are not proof that typo handling, ranking or natural-language interpretation works for your products. Test exact product names, ambiguous short terms and phrases before and after each change. Keep a record of what improved and what became too broad. A free public audit provides a separate view of observable storefront behavior; a full audit and a thirty-day pilot can then test changes against your own catalog and traffic.