You can change the language of the Covve Scan app in Settings.
Tap the Menu tab (three-line icon) at the bottom right of the screen, then tap Settings.
Tap Language (under Display). A language selector appears at the bottom. This only changes the language of the app. Covve Scan reads 60 or more languages on cards automatically, so there is no recognition language to set. See Scanning cards, QR codes, and badges.