Danish is the national language of Denmark and one of two official languages of the Faroe Islands (alongside Faroese). Until 2009, it had also been one of two official languages of Greenland (alongside Greenlandic). Danish is widely spoken in Greenland now as "lingua franca", and an unknown portion of the native Greenlandic population has Danish as their first language; a large percentage of the native Greenlandic population speaks Danish as a second language since its introduction into the education system as a compulsory language in 1928. Danish was an official language in Iceland until 1944, but is today still widely used and is a mandatory subject in school taught as a second foreign language after English. Iceland was a territory ruled by Denmark-Norway, one of whose official languages was Danish.