The Scottish FA are accusing the Bulgarian of breaching disciplinary rule 202, which means Tonev has, or is accused of excessive misconduct by the use of offensive or racial language.
The incident occurred in the second half of an Aberdeen-Celtic match on the 19th of September, when Aberdeen made referee, Bobby Madden, aware of the breach of conduct by Tonev.
Tonev denies the allegations, but is set to face a large punishment as the world's football associations look to crackdown on the issues of racism that have affected the game.
Aleksandar Tonev has currently made 10 appearances for Celtic, whilst on loan from Aston Villa. It is still unclear if the club will keep the young player, or send him back to Birmingham and even if that happens, will Villa want to keep him?
UPDATE: Tonev has beendealt a seven game ban by the Scottish FA.