Only about 70% of the English language has Latin root words. Pick up a law book or a book on biology.
Latin is also the direct ancestor of French, Italian, Spanish,and Portuguese as well as few other languages including Romanian.
Latin is relevant and for centuries was the dominant language of western civilization.
I think if it were reintroduced into our public schools we would see a dramatic improvement in the quality of education and increase in the intelligence of our youth.
I never did study Latin in school (it was not offered) but I took five years of a closely related langauge, Spanish.
We were lucky to live in a public school district where Latin was taught. My daughter studied for 3 years and, not surprisingly, had perfect verbal SAT’s. Without the Latin, she’d have done well, but nowhere near as well as with the base provided by Latin study.