If you check Wikipedia (and google for that matter for independent proof for those who don't like wikipedia for absolute truth) there is the nostratic hypothesis that speculates a link between many language families:
Uralic
Altaic
Kartvelian
Afroasiatic (usually included)
Dravidian (usually included)
Elamite (sometimes included)
Sumerian (sometimes included)
Nivkh (sometimes included)
Yukaghir (not always considered)
Chukotko-Kamchatkan (not always considered)
Eskimo-Aleut (not always considered
http://en.wikipedia.org/wiki/Nostratic_languages
Korean and Japanese are very controversial-some place them in the Altaic language family, but most consider them language isolates (languages with no living relatives). If Korean and Japanese do indeed belong to the Altaic family like some experts suggest, then that makes them distantly related.
Hokkienese is a chinese language, and thus it's part of the Sino-tibetan group and seems to be unrelated to the Nostratic group.
Ultimately though, who knows? Although an original language is probable, and any theory that tries to relate all modern languages with each other makes sense, it is impossible to reconstruct with any degree of accuracy. The huge success in the reconstructuction of Proto-Indo-European has made us too hopeful I think.
This is just a theory, however, and impossible to prove, due to the timescales involved.
Uralic
Altaic
Kartvelian
Afroasiatic (usually included)
Dravidian (usually included)
Elamite (sometimes included)
Sumerian (sometimes included)
Nivkh (sometimes included)
Yukaghir (not always considered)
Chukotko-Kamchatkan (not always considered)
Eskimo-Aleut (not always considered
http://en.wikipedia.org/wiki/Nostratic_languages
Korean and Japanese are very controversial-some place them in the Altaic language family, but most consider them language isolates (languages with no living relatives). If Korean and Japanese do indeed belong to the Altaic family like some experts suggest, then that makes them distantly related.
Hokkienese is a chinese language, and thus it's part of the Sino-tibetan group and seems to be unrelated to the Nostratic group.
Ultimately though, who knows? Although an original language is probable, and any theory that tries to relate all modern languages with each other makes sense, it is impossible to reconstruct with any degree of accuracy. The huge success in the reconstructuction of Proto-Indo-European has made us too hopeful I think.
This is just a theory, however, and impossible to prove, due to the timescales involved.