Ek doubt

During the nirdosh majaak track,jetha wrote all the sms's in Hindi.That means he knows how to write in Hindi.
But in CID track,why did he write his dukaan ka address in Gujarati and gave it to that Ajay fellow? He very well knows ajay is a marwadi and not a Gujarati then why did he write in Gujarati? 😆 Khali phokat ka Gujarati language ka promotion karne ke liye? 😆