Martian language is the nickname of unconventional representation of Chinese characters online.
Martian language may also refer to:
- A hypothetical alien language that dwellers of Mars would use
- Any of several alien language in science fiction
- Barsoomian language, the Martian language of Edgar Rice Burroughs
- Fake "Martian language" fabricated by Hélène Smith
- Le Langage martien (French: The Martian Language), a 1901 book by Victor Henry about the language of Helene Smith
- Any of several alien language in science fiction