This isn't Gemini, it's Poe. The blog post even admits that! I entered the exact same messages into Google AI Studio and it happily translated it to Sanskrit without any complaints about safety.
What's the difference between the Gemini Pro they connect to, versus what you're accessing via Google AI studio? Is Poe adding additional safety checks, or is Google adding extra ones when used via third-party services? Or is Poe just malfunctioning, or not always using the model it advertises?