UI5 i18n Text Localization
The concept name was not provided (undefined), so a precise definition cannot be produced. Based on the available sources, the closest identifiable topic is Text Customization and Localization in SAPUI5, which refers to the ability to replace or extend standard UI texts in SAPUI5 applications. Developers use it to add custom labels, adapt default titles of new or unnamed objects, and localize UI texts for apps they have extended or built. For more details, see Text Customization and Localization of UI Texts.