unoriginal -
not original; not being or productive of something fresh and unusual; "the manuscript contained unoriginal emendations"; "his life had been unoriginal, conforming completely to the given pattern"- Gwethalyn Graham
original not derived or copied or translated from something else; "the play is original; not an adaptation"; "he kept the original copy and gave her only a xerox"; "the translation misses much of the subtlety of the original French"
conventional following accepted customs and proprieties; "conventional wisdom"; "she had strayed from the path of conventional behavior"; "conventional forms of address"