Then you're not describing mutual intelligibility: > In linguistics, mutual intelligibility is a relationship between different but related language varieties

Then you're not describing mutual intelligibility: > In linguistics, mutual intelligibility is a relationship between different but related language varieties in which speakers of the different varieties can readily understand each other without prior familiarity or special effort. (emphasis mine) https://en.wikipedia.org/wiki/Mutual_intelligibility https://en.wikipedia.org/wiki/Mutual_intelligibility