This kind of Kinetic Typography was a staple of the Scala Video Titler for the Amiga, first and of Adobe After Effects for the PC, later.
After a while it became a bit boring because everyone was doing it everywhere, but to see it now, done so well, so much time before, and with only analog equipment, it is really inspiring.
I'd immediately remove every reference to linkedin -anywhere- and hard-block their domain in the code.
Only after, I'd probably seek a release from the injunction.
Perhaps you should involve a lawyer, but if you won't, then limit yourself to a brief matter of fact explanation of what you've changed, focusing especially on the block in the source code.
Do not address their points yourself. Refrain from any commentary, apologies, admissions.
I discovered that, in real life, it doesn't pay to be too agreeable. Sometimes enough is enough and dwelling too much on it will just hurt you.
So you're right: though you admittedly ended up in a good place, you've lost opportunities by biding too long.
Congrats for the new career. Enjoy, and the take hard the lesson with you. :) You paid for it, after all.
Because it's disrespectful (non-inclusive and non-welcoming) to willingly bar someone who can obviously hear you, from understanding the conversation.
If you are "out of range", or in another room, then by all means, go nuts. Speak Elvish or even Klingon if that's your fancy. It won't bother anybody.
But in the presence of others, respect demands to let everyone understand. Even if the conversation is completely irrelevant to them.
And if you don't even apply basic respect, when others will start assuming the worst about your conversations, than that'll be your fault. You'd have brought it on yourself. Not "them", not HR—which sooner or later is going to be brought into the conversation...
I would talk to the manager, explain what's happening, leaving my personal feelings aside.
Co-workers speaking non-shared languages in each other faces is not useful in any way and it leads to many problems, way beyond a non-welcoming and non-inclusive environment, way beyond just HR...
Moreover, and to answer some strange theories in other comments here, If you're to be excluded from a conversation, the speakers better get a room, where they can speak freely and leave you alone.
Just staying around and speaking a language you don't understand is plain rude, a nuisance, and will distract you anyway. (and probably become annoying, in the long term)
Having said that, I would also learn some Mandarin. If not enough to enter the conversation, at least enough to say "Would you, please, be so kind as to speak English for me? I'm learning Mandarin, but I can't understand you well enough, yet."
This worked wonders for me, in more than a few occasions.