his/her English
Ella está progresando con su inglés.
She is making progress with her English.
His English is perfect.
Su inglés no es malo, viendo que él ha estudiado por sólo dos años.
His English isn't bad, considering he's only studied for two years.
His English is excellent.
His English has improved a lot.
Su inglés es mejor que su francés.
His English is better than his French.
His English is not good.
Mejoró su inglés en dos meses.
His English improved in two months.
His English is quite good.