I think anyone who can learn a foreign language and learn it well enough to actually think in that language has really accomplished something.
Being an American, I am almost exclusively an English speaker. The little Italian, Spanish, and French I have learned are barely enough to keep me from starving when traveling. As for high school Latin, it helps build English vocabulary more then anything else.
I thank those GA authors who learned English as a second language for their efforts. The body of literature here is much richer for your presence.