This is an absolute FACT. It's only the last few years that I have been spending time in Accra. When I am in Accra I rarely have to speak Twi (could also be that its got more non Twi speakers there,too). When I am in Kumasi, it's a must. Kumasi, hold speaking local dialect with pride.
Itβs literally Kumasi that hold Twi up highhhh, Accra is alright generally but the English is crazy. Twinglish is even a whole movement.