From one college:
"Requirements
The College requires four semesters of language study, or its equivalent, for successful completion of any of its undergraduate degree programs. Entering students may take any language, other than English, offered by the College. There are twelve languages to choose from: Arabic, Chinese (Mandarin), French, German, Greek (Ancient), Hebrew (Modern), Italian, Japanese, Latin, Portuguese, Russian and Spanish."
The requirements do not say "foreign", so that's not a problem. However, they don't offer ASL, so ASL won't satisfy the requirement. I guess the problem is getting them to offer ASL.