Is it important to read MASNOON DUA in Sajda?
As Salaamu Alaikum,
For the Farz, Witr and Sunnah Salaah, you must make the Tasbeeh which has been prescribed for Sajdah. However, in the nafl (optional) Salaah, you can read masnoon duas (along with the Tasbeeh of Sajdah). You must recite these in the Arabic language in the manner they are transmitted.
And Allah knows best,
Mufti Waseem Khan