Earlier quoted context omitted.
for consulting learning norwegian would probably be an advantage.
It's implicitly understood that learning a country's official language(s) is an advantage.
In Scandinavia you could get by with English as a lot of people speak it, but for business dealings you need to learn the local language.
If nothing else you will need to communicate with the authorities constantly - immigration/work permit matters, insurances, health care, etc.
So don't expect English to carry you far unless you know at least the basics of the local language.