The top pick for most checkout teams is a two-layer routine: scripted locale runs in Playwright or Selenium for field behavior, plus manual review on real devices for keyboard, layout, and translated validation text. Choose it when your payment form ships to more than one market. The criteria that separate a working form from a broken one are the label wording allowed by each card brand, the digit rules per network, translated error strings, input mode and autocomplete attributes, right-to-left layout, and the PCI DSS limits on what you may keep.

cvv test localisation

What CVV localization testing covers

A CVV is the security code printed on a payment card. Visa calls it CVV2, Mastercard calls it CVC2, and American Express calls it CID and prints four digits. Localization testing means the input that collects that code reads and behaves the same way for a shopper in Tokyo, Berlin, or Dubai as it does for one in Chicago. The work spans four areas: the field label, the digit rules, the validation messages, and the layout in right-to-left scripts.

Test CVV Localization Guide

Field checks to run in every locale

• Label wording. Use the term the card brand allows and the term your acquirer expects. A literal translation of "security code" can conflict with the name printed on the card.
• Digit length. Three digits for most Visa and Mastercard cards, four for American Express. The field should accept the range your processor supports and reject nothing valid.
• Input mode. A numeric or password keyboard keeps mobile shoppers on a digit pad, and the cc-csc autocomplete token lets browsers and password managers fill the field.
• Translated errors. "Enter the 3 digit code" in German, Japanese, or Arabic has different length and reading order. Long strings can push layout or hide the submit button.
• Right-to-left layout. Arabic and Hebrew checkouts mirror the form. Digit groups inside the input should still read left to right.
• CJK and accented text. Placeholders and helper text need room for double-byte characters and for languages that run long, such as German and Finnish.
• Masking and logging. Mask the field on screen and keep the value out of logs, analytics events, and crash reports.

Automated locale runs

Script the form once, then run it against a locale matrix. Pseudo-localization catches hard-coded strings before translation starts.

related article

• Pros: repeatable, cheap to rerun, easy to assert digit rules and error copy per locale, and it fits a release pipeline.
• Cons: headless browsers do not reproduce a real soft keyboard, a card brand's own on-screen hints, or font fallback on Android and iOS.

Manual review on real devices

Test one phone per platform with the locale set on the device itself, not just in the browser.

cvv test translation

• Pros: catches keyboard type, RTL mirroring, font substitution, and truncated error text that emulation misses.
• Cons: slow, hard to repeat on every commit, and it needs reviewers who read the target language.

Common failures

• A three-digit field that blocks American Express customers.
• Error text translated once and reused in the wrong context.
• Form direction flipped while the input still expects digits in the wrong order.
• Analytics capturing a raw value because masking was applied to the display only.

Recommendation by use case

If you support two or three locales, run manual device checks each release and skip the automation. If you support ten or more, automate the locale matrix for rules and copy, then spot-check the five markets with the highest revenue on real hardware. Build test data from processor sandbox numbers, never from live credentials.

Compliance note

PCI DSS treats the CVV, CVC, and CID as sensitive authentication data. Requirement 3.2 forbids storing it after authorization, even in encrypted form. Your localization test rig should follow the same rule as production.