Let me put it to you this way: language has always been my strongest skillset, but even so, i never truly understood English (and it's my native tongue) until i took Latin. Granted, my Latin teacher was amazing, so i would imagine that with a bad teacher Latin might be somewhat useless. But with a teacher of at least mediocre ability, you'll likely find that your grasp of English and other languages you either have studied or will study will be much stronger.
Yes, i'm aware of the irony of claiming that language is my forte and then proceeding to mangle a paragraph like i just did. It's been a long day.
*edit 2* To clarify and/or elaborate: I've found that much of what we know or are taught lacks any knowledge or education regarding the why of the matter. English was very much that way, and two years of Latin gave me those answers. I also took 4 years of German, which helped as well, but the two years of Latin were much more valuable to me. Heck, my two years of Latin, taken concurrently with my last two years of German, helped me to grasp German better as well.