talking

my 9 month old barely talks . he doesn’t say mama dada, or beginning sounds ; all he does is grunt . i don’t know if i should be concerned we’re working with him A LOt when he gets baths all i say while i bathe him is mama dada baba (bottle) wawa (water) but he doesn’t repeat unless he screams and you scream back . my husband constantly does it back and i tell him not to because i want him to learn actual words. 🤦🏽‍♀️ anybody have any helpful hints or tricks ?