Place it at the switch point, just as the English text becomes French, then follow the reveal with the Wrong Answer Game Show buzzer when the translation is hilariously off, or with Oh My God Wow when the result is unexpectedly perfect.
About this sound
This is a four-second French café tune driven by a bright, bouncy accordion that works as an instant signal for French mode. It feels playful and cheeky, like a cartoon postcard from Paris, and lands before a viewer has read a word. Creators drop it into Google Translate jokes and fake translation edits, where the tune alone tells everyone the language has just switched.