Manx was beginning to differ from Middle Irish in about 900–1600 AD, and it is called Yn Ghaelg / Yn Ghailck by Manx speakers. There became fewer and fewer Manx speakers during the 19th century and the language was replaced by English. In 1901, 9% of the people in the Isle of Man were said to speak Manx but in 1921 the number dropped to only 1%. 