East Slavic languages only differ by the choice of i/y letters and Belarusian’s short u, Ukrainian yi and ye letters (and technically the apostrophe). You can have a combined Ukrainian and Russian alphabet keyboard. I have it on Heliboard
Bulgarian uses the er golyam/hard sign as a vowel, which it used to be in every Slavic language in the past. Macedonian is mutually intelligible, but uses an alphabet similar to BCS Cyrillic.
East Slavic languages only differ by the choice of i/y letters and Belarusian’s short u, Ukrainian yi and ye letters (and technically the apostrophe). You can have a combined Ukrainian and Russian alphabet keyboard. I have it on Heliboard
Bulgarian uses the er golyam/hard sign as a vowel, which it used to be in every Slavic language in the past. Macedonian is mutually intelligible, but uses an alphabet similar to BCS Cyrillic.