The same product, two languages, two prices shown

A bilingual store built by script, with every price checked by a test.

The live store, screen-recorded on a phone in early September 2026: the bundle page, the three-question discount window, the bundle math and what the bundle contains. The amounts are those shown that day.
The live store on a phone: the discount window, question 2 of 3, “Where would you use it most?”, with three answers to tap.
The live store on a phone: launch price, value bought separately, regular bundle price and total savings, then the add-to-cart button.
The live store on a phone: the product specs and what the bundle contains, each item with its price, then the total value.

The problem

A Quebec manufacturer needed a bilingual store where displayed prices are always right, because in Quebec a price mismatch can breach consumer-protection law.

What I built

Catalogue, pages, policies, market, translations and theme are pushed by an idempotent script against the Shopify Admin API, with a full dry-run mode. A Playwright suite checks the prices on screen against the live product data, in both languages.

Technical details

Zero-dependency Shopify GraphQL client with cost-based throttling
Diff-based theme deployer: pushes only what changed
28 end-to-end spec files on 5 device profiles
Meta Pixel add-to-cart events fixed so they no longer fire twice

Stack

Shopify Admin GraphQL
Liquid (Dawn, extended)
Node.js
Playwright
JSON-LD
Meta Pixel

The result

The tests caught a price gap before Google could flag it: $299 in the data Google reads, $340 on the page.

A similar project in mind?

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