"They Use Hausa To Teach English Language In The North" - Kano Corper Claims

Dr Joe Abah tweeted a piece of information stating that only 50% of primary 4 students in the North East can read single words of 3 or 4 letters. Someone replied saying it is not a surprise because they use Hausa to teach English language in the north. How true is this? https://www.pressnewsng.com.ng/2018/04/they-use-hausa-to-teach-english.html?m=0