Here is a respectful birthday wish in a Jain spirit:

Janmadin ki bahut bahut shubhkamnayein. Bhagwan Jinendra ki kripa aur ashirvad aap par sadaiv bane rahein. Aapka jeevan ahimsa, satya, aparigraha, aur shuddh bhavnaon se paripurn rahe. Aap dharm, shanti, aur anand ke path par nirantar pragati karein.

A shorter version:

Janmadin ki hardik shubhkamnayein. Jinendra Bhagwan ka ashirvad sada aapke saath rahe.