March 2026 — PrestaShop/PrestaShop monthly summary Overview: Delivered a critical robustness improvement for multilingual content by fixing the ObjectModel multilang field fallback. This ensures non-default language values inherit from the default language rather than being saved as empty strings, addressing data integrity issues that affected storefront display, checkout behavior, and order statuses. The fix extends the fallback condition to handle isRequiredWhenActive and defaultLanguageRequiredWhenActive validators, aligning with established CartRule behavior. Updated Behat tests to reflect the corrected fallback and prevent regressions. This work reinforces data reliability and user experience across admin and storefront surfaces. Key achievements: - Fixed multilang fallback in ObjectModel::formatFields to ensure non-default languages inherit values from the default language instead of saving as empty strings (commit 1fdb5478a4e7ac0a3436b8b2a454ea452d190320). - Extended fallback to cover isRequiredWhenActive and defaultLanguageRequiredWhenActive validators, restoring semantic parity with the default-language requirement. - Updated Behat tests to reflect the corrected fallback behavior and prevent regression in promo names, FO flows, and checkout. - Aligned with CartRule default-language fallback to avoid cross-component inconsistencies. - Demonstrated collaboration through co-authored changes (Claude Sonnet and Claude Opus). Technologies/skills demonstrated: - PHP, PrestaShop core ObjectModel architecture, multilang validation logic - Behat-based testing and scenario updates - High-precision refactoring with impact on data integrity, FO/BO flows, and merchant experience Business value and impact: - Improved data integrity for multilingual content across orders, promos, and storefront copy. - Reduced risk of checkout failures and display inconsistencies due to empty multilingual values. - Time savings for merchants and support teams thanks to more reliable behavior and better test coverage.