Candida may cause a white tongue (and white insides of your cheeks, and white under your tonge). But there are many more bacteria that also cause a white tongue.
To put it differently:
– Candida in the mouth may cause a white tongue, but that’s not a given.
– A white tongue may be caused by candida, but also by many other bacteria.
As far as I know, candida does not produce sulphur-containing gases. It’s these sulphur-containing gases that cause the smell of bad breath. These gases are produced by several mouth-dwelling bacteria, who may live on the tongue, but also in the pockets between your gums and your teeth.
So, similar to my above post: some people who have a white tongue and a bad breath do have candida, but many more people with these symptoms do not have candida. At least not in the mouth.