what is the rulling for tajweed of namaz when i am from india.. i try to pronounce words with proper tajweed like touching of tounge in places mentioned in tajweed rules.but due to my language sometime it does not come properly in once.. mostly in ruku i need to say the word 2-3 times to pronounce it properly..is it necessary to say this much time daily or just saying once is enough as i am trying in once and what comes from my mouth is enough??

Walaikumussalam
If in first attempt you can't pronounce correctly then as per the ruling repeat twice and thrice to recite correct one.
Wassalam