To this day, linguists have still not been able to definitively classify every language family and its members. Just as there are animals and plants that are yet to be fitted neatly into the schemes that taxonomists have constructed, linguists are still unable to assign many minor languages to their correct language family. It is also the case that experts often disagree about whether something is a language or a dialect, and that affects how many members are accepted for a particular family.
Here are just some of the language families that most researchers agree have more than 30 members languages:Niger-Congo, Austronesian, Trans-New Guinea, Afro-Asiatic, Sino-Tibetan, Indo European, Nilo-Saharan, Austro-Asiatic, Sepik-Ramu, Arawakan, Tupi, Tai-Kadai, Torricelli, Carib, deaf sign lnaguages, Oto-Monguean, Dravidian, Hmong-Mien, Macro-Ge, Quechuan, Panoan, East-Papuan, Mayan, Geelvink Bay, Uto-Aztecan, Uralic, Tucanoan.
In total, researches have so far distinguished more than 100 languages families. In addition there are language isolates whose membership has yet to be determined. Korean is among the better known languages isolates.