Javanais (Javanese) is a language code used in French slang. It consists in inserting the letters "av" before the first vowel of every syllable, even if the syllable is written but not pronounced.

For example, "bonjour" (hello) becomes "bavonjavour" (havellavo).

Javavavanavais avis navot avusaved vaveravy mavuch, navowavadavays.