The term 'ONE SKILLED IN LANGUAGES' can be summarized as a LINGUIST, which is an 8 letter word. A LINGUIST is someone who specializes in the scientific study of language and its structure, including the study of grammar, syntax, and phonetics. They are also experts in the history and development of languages, as well as the relationships between different languages. Linguists may also specialize in the study of particular languages, such as English, French, Spanish, or Chinese.