Many everyday words are built on a 国名: add 人 for its people and 菜 for its food, as in 法国人 and 法国菜. A language usually drops 国: 法国 gives 法语.
culture
Many Chinese country names are a sound loan cut to its first syllable plus 国: 美利坚 became 美国, 英吉利 became 英国, and 德意志 became 德国. The characters chosen also happen to mean "beautiful", "heroic" and "virtuous".