The verb English in the sense of to translate into English dates to 1450, according to the OED. The sense of to anglicize, to impart an English character to, dates to 1711, that example having for object a musical form, the madrigal. The sense of to impart spin on a ball dates from 1875 and is flagged as a peculiarly American usage. These are all senses that are not flagged as obsolete or rare. So yes, its use as a verb is current.