Home grown players don't have to be English - "a Player who, irrespective of his nationality or age, has been registered with any Club (or club) affiliated to The Football Association or the Football Association of Wales for a period, continuous or not, of three Seasons or 36 months prior to his 21st birthday".
So that includes, for example, Bellerin, Christensen, Schneiderlin, Sigurdsson, Schmeichel and Lukaku.