When colleges say they want 4 years of a foreign language they generally mean reaching level 4 of one language. Taking one year of German or Italian will not meet the four years of foreign language standard (although it may be incrementally better than not taking any additional foreign language)…
You may want to read through the FAQ on Foreign language. http://talk.collegeconfidential.com/college-admissions/1802227-faq-foreign-language.html#latest