Completion of French 2 often counts as two years of French, even in the absence of French 1 on the transcript. Many colleges look at the level completed, rather than the number of years, and many accept external proof of proficiency in the form of sufficiently high scores in SAT subject or AP tests in the language. College courses are also often accepted.
Check each college as to the specifics of its foreign language requirement. State universities often have detailed descriptions of what they actually accept (example, see here for California public universities: University of California - a-g Guide
Be aware that a college may require higher proficiency in a foreign language for graduation than admission.