As someone on reddit mentioned yesterday "Jia Cheong Tan" is an anagram of "CIA Agent John". Which may be accidental or a funny pun by the backdoor coder.
You can disable that the dialog shows up, then it's just a subtle icon.
That it often doesn't show up at all is indeed a bit confusing. I can translate german to english or french to german, but english to anything doesn't seem to show up on english websites even thought it's an option when I'm on a non-english website.