If a player uses inappropriate language after halftime, where do they serve their penalty?

When a player uses inappropriate language after halftime, the appropriate course of action is to serve their penalty at the start of the second half. This approach ensures that the penalty is enforced immediately and reflects the severity of the misconduct that occurred. The player is effectively being held accountable for their conduct right away rather than delaying the consequence until later in the game or in subsequent matches.

The other options do not align with the usual procedures for penalizing such behavior. Serving the penalty in overtime or during the next match would allow the player to avoid immediate repercussions, which does not serve the purpose of maintaining discipline and sportsmanship in the current match. Immediate ejection for the next game is also not a standard penalty for inappropriate language used immediately after halftime, as it doesn't address the behavior that occurred in the ongoing match context.