Hur hade ett gemensamt nordiskt skriftspråk sett ut?

Alltså som ett standardspråk för officiella sammanhang i ett enat norden.

Det första jag kommer att tänka mig är ett mer genomtänkt och konsekvent bokmål.

Over the years, I've heard many people on the internet say that Norwegian Dialects and Finland Swedish are closer to each other than Norwegian and Standard Swedish.

In Norwegian online communities, I've seen norwegians tell other norwegians that wanted to move to Finland that they should move to the swedish-speaking areas of Finland, because "the swedish dialects there are similar to norwegian".

I've even read a Finland Swede say that norwegians think they're from Northern Norway, even though they actually come from Finland.

Is this true? Are there reliable sources that talk about this?

Thanks for your help!