Im not smart enough, rich enough or well connected enough to change the word with language, i would get assassinated real quick. With unrestricted safe personal teleportation i could kill anyone, go anywhere, do anything, especially if i can bring a knife or gun.
Law could not keep up. I can prove that i was in a bar in a different country when the leader of a large empire mysteriously was killed in his sleep. You can dispose of half the evidence in the middle of the atlantic, and the rest on top of everest.
With a mask and some shoulder and hip pads one can become an unrecognizable ghost. Kill anyone you like. Is telefragging a thing? Cause i would totally telefrag a few billionaires.
Talking to anyone would be so useful, you could start revolutions across the word. You could build bridges between everyone with an internet connection. But you can't run. You couldnt escape. If you can't bring enough people together to protect you, you would either become a tool of your preferred state, or you would die. Sure you could be quiet, live your life making money, being easily able to obtain personal comfort, but thats helps only you.
Im not smart enough to manipulate enough people to be safe. I mean, either way, a bullet from a sniper will end you. But you can hide with teleportation. No safehouse bunker or hole is safe from you. The force projection of a teleporter is infinite. In a night you could eradicate the 10 richest people in the world. The next day you could decapitate half the world's superpowers.
Soft power is great but it lacks the edge needed to force change.
If you can teleport more than what you carry? Such as a person? Even better. Kidnap a world leader accused of warcrimes and have him tried. Make those who profit from the suffering of billions disappear without a trace. Instill the fear of "god" into those who think their wealth voids them of responsibility.
Hell, you dont need to kill directly. Just /TP ashameow 37.4426148, -122.1622446 with a lighter and a jug of gasoline. Start burning warehouses. Sabatoge shipping yards. Steal from fort knox with ease.
I wish the world was a nice enough place that i could choose language.