Place it right after the offer to pay is shown, then follow it with a celebratory French meme track as the group heads out. Keep it as the punchline of the scene, not background filler, and let the next shot show the meal or drinks arriving.
關於此聲音
This is Gragas speaking in French for about three seconds, agreeing that it works for him if you are the one paying. His voice sounds hearty and good-natured, like a big brewmaster happy to accept a free round. It feels playful and cheeky, turning an offer to cover the bill into a light joke. The line comes from the French voice-over for Gragas in League of Legends.