making dua in salah

can I make dua in prostration in mother tongue? if I can then when inside in salah or I should make extra prostration/sperate prostration without salah to make dua? can I make dua in prostration of fard sunnah and nafl salah too? can I make my own dua in prostration besides quraan sunnah duas? and last can I make dua in last rakat of salah after finishing durud? if I can then can I make the dua in my own native language? cause I don't know arabic and can I make dua what I need in that part? or quraan sunnah duas?