ANSWER:

This is permissible. 

DUA IN OWN LANGUAGE
You can make dua in your Salah, both fard and voluntary, in sujood and in the last tashahud, before making salam and in your own language, providing you don’t know how to make that particular dua in Arabic.

https://youtu.be/hYToZVeAl20

I am very confused about whether I can recite masnoon duayein in farz and sunnah prayer (particularly in sajood) because I heard people saying that it is not permissible to recite in farz prayer