I think many people would welcome a compendium, glossary or other information database that will help non-D&D players and veterans alike get to grips with the nuances of BG3, especially where it chooses to diverge from expectations.
In terms of the translation, there is no difference - it's just a short-hand way of say how many dice, of which size, are being spoken about. If, in the german, the word for 'dice' begins with a W, then it may well be written as 1w4 instead of 1d4, as it would be in english... in cases where the letter changes, assume a simple translation slip; they mean the same thing.