What it is called watercress in Maharashtrian language?

Watercress is called "Haldi" in Marathi. However, it's important to note that "Haldi" is more commonly used to refer to turmeric. So, to avoid confusion, you can specifically say "Jal Haldi" which translates to "water turmeric".

Another common term for watercress in Marathi is "Jalebi Saag" which literally translates to "Jalebi greens".