I'd second what jdmhotness has said as far as language experience goes. Language "mastery" is kind of a hazy thing, and your having tested out of a language requirement at one institution or another generally won't be as encouraging to an admissions committee as your being able to demonstrate, either through multiple years of coursework with high marks and/or letters of recommendation stressing your readiness in this regard from HB/ANE faculty who have themselves demonstrated philological expertise through publications, general reputation, etc. This isn't meant, I should add explicitly, to throw any doubt on your own skills or competence -- just, I hope, to give a better idea of the thought behind the "how many years of language" question and its appropriateness.
It's great to see that you're considering such a slate of programs in Boston -- if one has to restrict him or herself to a particular area of the country for HB/ANE, one can't do much better as far as options go. :-) Good luck!
