@elmoyenique: What do you think, to what extent can this font be called mine? On the one hand, I made it based on your letters, on the other hand, I changed every letter and many fonts are made based on others, using other people's ideas. It’s interesting to know what others also think about copyright, you can write if it’s not difficult for you.

@elmoyenique:Thanks for the answer. So I can sell this font just by crediting you as a co-author, but without paying any money? I don't plan to do this, but it seems to me that this is the font I can make, but the others, in which I simply added the Cyrillic alphabet, cannot. There are simply fonts that are sold and made based on others,
no one is reinventing serifs, Baskerville or Bodoni. They look at a scan of the original font and draw over it again. So I kind of did the same thing, but making major changes. Or must many years pass since the author's death before his fonts can be redrawn or used as a basis or reference?