Well Hasan Nisar saab
Sirsyed was declared kafir not coz he said learn english he was declared kafir because
sir syed declined the waqia of adam a.s and hawa a.s in jannat, he did not belive in angles and he was probably under impression that isa. a.s is dead.
a so called tafseer of sirsyed by name of hayat e javed explains his beliefs