Culture thumb|right|Commemorative plaque in Cornish and English for Michael Joseph the Smith () mounted on the north side of Blackheath common, south east London, near the south entrance to Greenwich Park The Celtic Congress and Celtic League are groups that advocate cooperation amongst the Celtic Nations in order to protect and promote Celtic languages and cultures, thus working in the interests of the Cornish language.
Culture thumb|right|Commemorative plaque in Cornish and English for Michael Joseph the Smith () mounted on the north side of Blackheath common, south east London, near the south entrance to Greenwich Park The Celtic Congress and Celtic League are groups that advocate cooperation amongst the Celtic Nations in order to protect, and promote Celtic languages and cultures thus working in the interests of the Cornish language.