I might get you wrong, but the point of the US langpack is having a langpack with enroll. The default en language pack uses enrol.
Neither of them are misspelled: enrol is the British English variant, enroll the American English (see https://www.grammar.com/enrol_vs._enroll)
Neither of them are misspelled: enrol is the British English variant, enroll the American English (see https://www.grammar.com/enrol_vs._enroll)