Each school administrative unit:
1. Required to offer. Shall offer one 2-year sequence in a world language; and
2. Encouraged to offer. Is encouraged to offer one or more additional world languages as part of its secondary school program.
3. American sign language.
American sign language is a world language and may be offered to fulfill the requirements of this section.
For purposes of this section, "world language" means a language, either ancient or modern, that is used or has been used for written, oral or signed communication in the multilingual and multicultural worldwide community.