Their judiciaries are very different from how you describe civil law systems.

>Judges in Scandinavia have investigative powers and can judge the truth of the matter.

This is, at best, technically correct. While Judges in Nordic countries tend to technically have some limited investigative powers, it is extraordinarily unusual for them to be used in any meaningful capacity.

In reality the investigate powers wielded by judges in Nordic countries tend to be the same as in common law countries, asking a question here and there during the hearing to make sure they're keeping up.

These countries are certainly not at all like France or Spain where you might have examining magistrates, criminal investigations are run by the police and prosecutors.