On the other hand according to the Foreign Service Institute(Department of State) it takes about 1k hours for a native English speaker to reach "proficiency" at

On the other hand according to the Foreign Service Institute(Department of State) it takes about 1k hours for a native English speaker to reach "proficiency" at speaking and reading "Languages with significant linguistic and/or cultural differences from English": Level 4. If your full-time job for seven years were learning spoken languages, you could become proficient in 14 of them. Or maybe you want want to learn 7 of them and leave room for nearly all level 1-3 languages. Maybe you just want to spend 2 hours a day M-F(you slacker!), you'll only be able to learn Spanish, Portuguese, Italian, French, German, and.. Dutch.