Can you tell me if reciting through the nose is a major mistake or a minor mistake.

Question
Assalaamu alaykum

Can you tell me if reciting through the nose is a major mistake or a minor mistake.

JazakAllahu Khayran for all your help and may Allah reward you immensly for this great service your team provides the ummah.

Answer
Wa alaikum assalaam wa rahmatullahi wa barakaatuh,
The major mistakes are those which change the letter sounds or change the meaning by changing the sounds, vowels, or characteristics which lead to a letter sounding other than the correct letter.
Adding the ghunnah sound where it shouldn't be is generally a minor mistake, but if it is prevalent to such a degree that it leads to letters sounding different than the actual letter and like some other letter, or obscure, it can be a major mistake.
 Wa iyyaakum