In Germany, I had salary negotiation closer to what I was used to in the US (e.g.: two competing offers, etc).
In Denmark, very little room to maneuver. I had no luck negotiating salaries in big corps here (Final comp in DK mostly from salary). Every attempt I made to initiate a salary discussion/negotiation seemed to make the hiring managers uncomfortable as in “we don’t do this here”..
About the only thing I could see you getting in Denmark is a cost of living raise or maybe something to the whole department or team.
Some EU countries have a much stronger emphasis on sectoral bargaining. (Often there's a formal mechanism for everyone to work together to negotiate more pay)