Adam Clarke's Bible Commentary Verse 5. Isles of the Gentiles] EUROPE, of which this is allowed to be a general epithet. Calmet supposes that it comprehends all those countries to which the Hebrews were obliged to go by sea, such as Spain, Gaul, Italy, Greece, and Asia Minor.
Every one after his tongue] This refers to the time posterior to the confusion of tongues and dispersion from BHebel.
Matthew Henry Commentary
Verses 1-7 - This chapter shows concerning the three sons of Noah, that of them wa the whole earth overspread. No nation but that of the Jews can be sure from which of these seventy it has come. The lists of names of father and sons were preserved of the Jews alone, for the sake of the Messiah Many learned men, however, have, with some probability, shown which of the nations of the earth descended from each of the sons of Noah To the posterity of Japheth were allotted the isles of the gentiles; probably the island of Britain among the rest. All places beyond the sea from Judea are called isles, Jer 25:22. That promise, Isa 42:4, The isle shall wait for his law, speaks of the conversion of the gentiles to the faith of Christ.
Original Hebrew מאלה428 נפרדו6504 איי336 הגוים1471 בארצתם776 אישׁ376 ללשׁנו3956 למשׁפחתם4940 בגויהם׃1471