Lagertha was a Viking shieldmaiden and ruler from what is now Norway, and the onetime wife of the famous Viking Ragnar Lothbrok. Lagertha’s career as a warrior began when Frø, king of Sweden, invaded Norway and killed the Norwegian king Siward. Frø put the women of the dead king’s family into a brothel for public humiliation. Hearing of this, Ragnar Lodbrok came with an army to avenge his grandfather Siward. Many of the women Frø had ordered abused dressed themselves in men’s clothing and fought on Ragnar’s side. Chief among them, and key to Ragnar’s victory, was Lagertha. Impressed with her courage, Ragnar courted her from afar. Lagertha feigned interest and Ragnar arrived to seek her hand, bidding his companions wait in the Gaular valley. He was set upon by a bear and a great hound which Lagertha had guarding her home, but killed the bear with his spear and choked the hound to death. Thus he won the hand of Lagertha in marriage. According to Saxo, Ragnar had a son with her, Fridleif, as well as two daughters, whose names are not recorded.
The Norse way of speaking, no one really knew what the Vikings sounded liked, they were Norsemen. The accent is really a combination of a Scandinavian accent, maybe with a Swedish accent and an old way of speaking.