As long as the dynamic doesn't lead to, well, death. XD

I did a bit of research on Old Norse (And it's evolution into the modern day Scandinavian languages) once, mainly to explore the idea of William the Bastard losing the battle of Hastings and the English language continuing to evolve based on it's Nordic and Germanic roots. Riveting stuff, but ultimately I chose Icelandic for my base since it's the closest we have to Old Norse in present times.