The lyrics are from the Solomon Islands (small islands north of Australia).
Колыбельная с Соломоновых Островов (маленькие острова к северу от Австралии)

(Baegu)
Sasi sasi ae ko taro taro amu
Ko agi agi boroi tika oli oe lau
Tika gwao oe lau koro inomaena
I dai tabesau I tebetai nau mouri
Tabe ta wane initoa te ai rofia

Sasi sasi ae kwa dao mata ole
Rowelae e lea kwa dao mata [bad word] 
I dai tabesau I tebetai nau mouri

Sasi sasi ae ko taro taro amu
Ko agi agi boroi tika oli oe lau
Tika gwao oe lau koro inomaena
I dai tabesau I tebetai nau mouri
(repeat x 3)

English version:

Little brother, little brother, stop crying, stop crying
Though you are crying and crying, who else will carry you
Who else will groom you, both of us are now orphans
From the island of the dead, their spirit will continue to look after us
Just like royalty, taken care of with all the wisdom of such a place