The Serbo-Croatian standard languages (Croatian, Serbian, Montenegrin and Bosnian) have one of the more elaborate kinship (srodstvo) systems among European languages. Terminology may differ from place to place. Most words are common to other Slavic languages, though some derive from Turkish. The standardized languages may recognize slightly different pronunciations or dialectical forms; all terms are considered standard in all four languages, unless otherwise marked: [B] (Bosnian), [C] (Croatian), [M] (Montenegrin) and [S] (Serbian) below.