The score/raw score drift is a side-effect of combining the languages. There seems to be an adjustment calculated from the median number of votes, so as a workaround raw scores were used for the non-English categories.
Found this:
The formula for jam ratings is
adjustment = sqrt(min(median, votes_received) / median)The adjustment for game that got 19 votes in a jam with median of 20 is =
0.97467, about a 2.5% reduction in average score, eg. a 4.5 rating would go to 4.386 for the purpose of comparison during ranking.
(https://itch.io/t/644401/calculated-ratings-for-jams-vs-raw-scores)
This said, I loved the combined jam format, so my vote would be to maintain it in future editions.
Edit: Congrats to the winners, it’s been an amazing comp!