Not unless speaking Ignan can set things on fire...
[The above in response to the "Demons are made of pure evil, so their language is too" argument -- "Fire elementals are made of pure fire, so their language is too?"]
Anyhow, by the rules there is nothing mechanical that happens if you speak Abyssal, so a Paladin could speak Abyssal 24/7 forever without any chance of a loss in status. If you want to make a house rule, that is your perogative, of course, but warn your players first!