Right now, the languae on all of my office applications is Hebrew, and I can't set it to English. In Options -> Language, my display language is set to match the Microsoft Windows language (which is English), but for some reason it doesn't match it. I also don't have an option of installing new display languages. My office version is Microsoft Office Professional Plus 2016.
This is how my language options look on excel: 1 - This says "Other display languages", and it's empty for all office applications.
2 - Match "Microsoft Windows" is first priority, but It's still not in English.