England’s Joe Marler will face a World Rugby misconduct hearing on 5 April for calling Wales’ Samson Lee a “Gypsy boy”.
Six Nations organisers had ruled Marler would not be punished for his comments made during a game on 12 March.
But World Rugby, which governs the international game, says his remarks “amount to misconduct and/or a breach” of its code of conduct.
Marler made the remark during England’s 25-21 win over Wales at Twickenham.
He apologised to Lee, who is from the Traveller community, at half-time.
The Harlequins player was reprimanded by England head coach Eddie Jones, although the Welsh Rugby Union was disappointed with the lack of a ban.