What lung or mouth disease is NOT known to be caused by smoking?

Apnea is not a "disease"! Apnea is a symptom of either a condition or a disease. Apnea is a temporary lack of breathing during sleep or during altered consciousness (such as during pre or post surgery). Sleep apnea or obstructive apnea can have numerous causes, including as a reaction to respiratory depressant medications (example, narcotics, even when given in the hospital), illegal drug use, obesity, throat problems, or a co-existing lung disease, acute illness, etc.

The symptom of apnea has nothing to do with smoking.

As to mouth, most oral infections such as yeast (which causes oral thrush) or viral infections (like Herpes Cold Sores) have nothing to do with smoking.