@x5nder Sorry for this very late reply, i was not aware of your question though maybe you already found the answer or my answer is no longer needed. But since i found it by a simple google search. Maybe others seeks the same answer.
First of all, yes. As of Jan 2025 i am still maintaining this module.
Region code to use for fetching the correct price area are listed over at Nordpool
https://data.nordpoolgroup.com/map?deliveryDate=latest¤cy=EUR&market=DayAhead&mapDataType=Price&resolution=60
Netherlands (Dutch?) is NL
France is FR
Oslo area is NO1
Poland is PL
and so on…