interrested for DSA PBT if there are language sets.
The problem of language sets is the num row which is different in every layout. I propose to make a simple row with only one layer, could be numbers or symbols, to decrease the weight of language kits. This can be done with the other rows (for example, a unique comma and point key without any shifted symbol labeled) but I don't think it will be very popular.
For the fee problem, you could make PBT dyesub for the 1unit keys, spacebars… and ABS doubleshot for the others. I don't know if labels with the same font match between this two processes but for coulours we can have all peripheral darker keys in ABS and a clearer heart in PBT. The prob is for blank modifiers : the PBT colour should be the same as those in ABS or very close.