No, generally a fielder should not talk while a bowler is bowling.
Cricket etiquette dictates that fielders should remain silent from the moment the bowler begins their run-up until the batsman has completed their shot. This is to avoid distracting either the batsman or the bowler. Talking, especially loudly or disruptively, could be considered unsportsmanlike conduct.
While specific rules might not explicitly prohibit all talking, the convention is strongly observed at all levels of cricket to ensure fair play and maintain concentration.
