A very disagreeable and common fault is nasality, or "talking through the nose."
Why not forswear French again and pronounce nuance without trying vainly to preserve the Gallic nasality of the second n—newance?
As for the fault of nasality, it is, as I have said, the most difficult to get rid of.
The common defects of nasality, throatiness, and harshness, are due to wrong and careless use of the speaking-instrument.
1650s, "of the nose," from French nasal, from Latin nasus "nose, the nose, sense of smell," from PIE *nas- (see nose (n.)). Of speech sounds, attested from 1660s. As a noun, "nasal letter or sound," from 1660s. Related: Nasality; nasalization.
nasal na·sal (nā'zəl)
Of, in, or relating to the nose.