I am a native French speaker and I never heard javanais (grew up in Paris city). However, I had a teacher who was always saying "Do I have to tell you that in

I am a native French speaker and I never heard javanais (grew up in Paris city). However, I had a teacher who was always saying "Do I have to tell you that in Javanais?" (sarcastically) when we were not paying attention to what she was saying in class.