Like the Polynesians of the Pacific in the 14th century who came to NZ among other islands, the Vikings were into sailing long boats across the seas to colonise new lands with warriors toting weapons to deal with natives in ‘terminal’ ways.
Their Old Norse language ended up being spoken in large parts of east England and fused into Anglo Saxon. It is still spoken in close to orginal form in Iceland, whereas in Denmark, Sweden and Norway it was substantially changed by influence from German in the same way that Norman French changed Old English.