In some experiences, Roblox will automatically translate chat messages from players in other languages into your language. When you join a chat translation-enabled experience, you will see a system message saying chat is being translated.
If you want to know which specific messages are translated, you can turn on “Option to See Untranslated Message” in the Settings menu. If this setting is enabled, an icon will appear in front of translated messages. You can also click/tap the toggle to switch between the original message and translation.
If you want to turn chat translation off, you can do so by turning off “Automatic Chat Translation” in the Settings menu. When chat translation is turned off, all messages will revert back to their original form and you will no longer see translations.