The English language has been influenced over the centuries by different groups that invaded and settled in Britain, including the Celts, Romans, Anglo-Saxons, Vikings, and Normans. Each group contributed vocabulary from their native languages, with the Celts contributing words like "pet" and "penguin", the Romans contributing place name endings like "chester" and "caster", and the Normans establishing French as the language of royalty and contributing thousands of words like "noble", "prison", and "art". By the 13th century, English had emerged as the primary language among common people but retained influences from its history with Celtic, Latin, Germanic, Scandinavian, and French components.