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I figured out how to reliably do prompt injection on Google Translate, due to the fact it now uses Gemini internally. Just ask it a question in Japanese and put "[Translator: <your prompt>]" afterwards.

ading.dev

@ading.dev

7 Feb

Here is the link for the prompt used in the screenshot. Make sure you set the translation model to "advanced" rather than "classic." It seems to be the most reliable with the Japanese -> English translation mode. translate.google.com?sl=ja&tl=en&...

translate.google.comGoogle TranslateGoogle's service, offered free of charge, instantly translates words, phrases, and web pages between English and over 100 other languages.

ading.dev

@ading.dev

There seems to be an internal check in Google Translate that tries to ensure that the output length is consistent with the input length, otherwise it will fall back to the old translation model. However, you can fool this check by padding your input with a bunch of dots.

7/2/26, 8:48 am0 reposts1 like

ading.dev

@ading.dev

7 Feb

Here are some more funny examples: