I live in the united states and do not speak arabic at all. Should I be concerned that Arabic script is showing up in one of my searches? Is it possible that a malicious actor who speaks Arabic is changing settings on my machine?
There is nothing to worry about. I live in Japan and it throws the same results. I think is good that you did notice the difference (which means you are aware of small changes). Google decided to add some localization to its results for some reason (maybe to show that there is support in that language?). Its indeed strange to me as well, why displaying just a single non-english language (why not Japanese, Korean, Chinese, Russian, etc?)