Correct spelling for the English word "Montanic" is [məntˈanɪk], [məntˈanɪk], [m_ə_n_t_ˈa_n_ɪ_k] (IPA phonetic alphabet).
Pert. to or consisting of mountains.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.