'Iolani's Upper School Foreign Languages Department provides sequences in five languages, including:
Students may begin in grade 7 or 9. The objective of the courses is to teach students to understand, speak, read and write the language they are studying, and to introduce them to a foreign culture. Except for Latin, the target language is used in the classroom, and liberal use is made of audio and video. Study through levels IV and V may earn advanced placement (AP) credit in college in some languages. All students are required to complete three years of the same foreign language.