Martynak
Martynak — optimized keyboard layout for Ru/En langs. Based on fully optimized QGMLWY layout.
How to
Now you can learn En version of this layout on Mac with KeyKey. Don't worry about Ru-layout because it's has a high mnemonic compatability.
This app available in Setapp and App Store!
Also you can use Type Fu extension for Chrome (Vivaldi, Opera, Edge etc.) with custom layouts to learn En and Ru versions. Custom layouts for this app are located at ./type-fu-layouts/.
Why
Talk about layout (Ru)
Youtube: 
Features
- Phonetically associated layouts
- Optimized for blind typing (and truly blind too)
- Compatibility of punctuation keys in RU/EN layouts
- QWERTY hotkey compatibility in Apps
- Low efforts and errors level
Examples
En layout
Ru layout
Both layouts on pressed alt/option
Both layouts on pressed Cmd or Ctrl
Usage
For Mac
Just run dmg file. Make layouts basic for input in both languages in the settings.
For Windows
Download and unpack archives with Russian and English languages, then run .еxe files. Make layouts basic for input in both languages in the settings.