Would like to highlight some development features of Nunito. Cyrillic expansion was completed in tandem with Manvel Shmavonyan, who mainly was responsible for the drawing part, while I focused on the production side.
Our biggest discussion was on the form of Cyrillic Ka.
Choosing the form of Cyrillic Ka. (winner: 1)
HT LetterSpacer proved to be particularly helpful for setting metrics in the Bold master. It took me 8 attempts to find appropriate values.
Initially set metrics in Bold, too tight:
Metrics adjusted with HT LetterSpacer
While Jacques used special .bold variant glyphs for the Heavy master during the
raisin project, fine-tuning some Cyrillic glyphs would not have been possible without the use of Bracket Layers (for both Light and Bold masters).
without bracket layers:

with bracket layer applied to ExtraBold, Black, Heavy:
The bracket layer itself: