• Qt's localization and internationalization changes from 6.7 to 6.9.
• Context of localisation and internationalisation in Qt.
• How Qt uses locale identifiers and QLocale.
• Recent events and fixes related to QTranslator and uiLanguages().
• Matching script and handling of different scripts for languages.
• Ensuring correct behaviour and getting it right.
• Implications and suggestions for using QLocale::uiLanguages().