The term COMMON LANGUAGE can be broken down into two crossword solutions: ENGLISH (7 letters) and SLANG (5 letters). ENGLISH is a West Germanic language that originated in England and is now the most widely spoken language in the world. It is the official language of many countries, including the United States, Canada, Australia, and the United Kingdom. SLANG is a type of informal language that is used in casual conversations. It often includes words and phrases that are not found in formal language and can vary from region to region.