If you want to change the text and the buttons in the consent management window, you have to use the MODX lexicon system.

Navigate in the manager to System (gear icon) > Lexicons. In the lexicon management grid you have to select consentfriend as namespace, web as area and the language, you want to change the entry.

Double click on the value of any of the strings to edit them and clear the MODX cache for changes to appear in the front-end.

The changes made this way will also persist across updates of the ConsentFriend package.

The ConsentFriend lexicon can be translated on Weblate.