Problem: The client was unable to translate the "the7 mini cart popup".
Solution: 1. We registered the option popup of the widget "The7 Menu Cart" for translation by adding custom XML configuration code to WPML > Settings > Custom XML Configuration:
2. We instructed the client to go to Templates and translate the header template "the7 header minimal".
3. We guided the client to navigate to WPML > String Translation and translate the popup ID with the translation ID, as shown in the attached screenshots.