Clients often ask me what languages are covered by most professional fonts and I still have to tell them that there’s no simple answer. A good foundry clearly illustrates each font’s support, but a lack of a standard makes it difficult to compare between foundries.
Is it fair to say most font makers now use the labels “Basic Latin” and “Latin Extended” to describe their Latin-based character sets? How standardized are those sets? What is your favorite reference for those sets that explain to the average human which languages are covered?