The problem with o/a is that in some dialects they indeed pronounce 'o' instead of 'a'. Pronouncing 'a', or 'akanye', as it's done in Moscow, became the right w

The problem with o/a is that in some dialects they indeed pronounce 'o' instead of 'a'. Pronouncing 'a', or 'akanye', as it's done in Moscow, became the right way and was imposed through the education system throughout the Soviet Union. Hence, not doing so may be perceived as a sign of a low education level/social status.