Localization Testing
Localization testing verifies that a product's translated, region-specific version is linguistically accurate, culturally appropriate, and correctly formatted for a target locale — checking actual translated text, local date/currency formats, and region-specific content, not just whether the system architecturally supports other languages.
Where internationalization testing checks that a system can support any locale, localization testing checks one specific locale's actual implementation: is the Japanese translation accurate and not just machine-translated nonsense, does the price show correctly in yen with the right formatting, are images and colors culturally appropriate for that market.
It requires either native speakers or trusted localization vendors — automated testing can catch layout breakage from translated text, but can't judge translation quality or cultural appropriateness on its own.
