In app/javascript/components/modals/track-welcome-modal/LHS/steps/HasLearningModeStep.tsx there is (You can always change later.), and in app/javascript/i18n/en/components-modals-track-welcome-modal-LHS-steps.ts, there is 'Would you like to start the track in Learning Mode or Practice Mode? (You can always change later.)', On the website, this produces:
Would you like to start the track in Learning Mode or Practice Mode? (You can always change later.) (You can always change later.)
With the parenthetical repeated twice.