There are some other great examples in the book as well, like this gem: What Ragnar is supposed to have said as he died in King Ella's snakepit, according to t

There are some other great examples in the book as well, like this gem: What Ragnar is supposed to have said as he died in King Ella's snakepit, according to this second version, is: Gnyðja mundu grísir, ef galtar hag vissi. One of the things that has always struck English translators of Norse is that it seems on the surface really rather easy to translate, with words which are unexpectedly familiar. But then one isn't quite sure what they mean. In this case grísir means greasies, little pigs, piggies, while gnyðja is clearly onomatopoeic and means grunt, or even, arguably, "go oink oink". And what Ragnar is saying - grimly, roguishly, perhaps with a nod and a wink - is, "the piggies would grunt if they knew of the old boar's death". He, of course, is the "old boar", and the "piggies" are his sons.