1) Barbarism 2) Crudity 3) French word used in English 4) Lack of elegance 5) Lack of gracefulness 6) Lack of polish 7) Mannerism 8) Quality 9) Slang 10) Solecism 11) Stiffness 12) Unlettered muse Found on https://www.crosswordclues.com/clue/inelegance