Talking

Anyone else 18month old still not talking yet ? My LO talks but it is still more baby talk & im starting to get worried . He does know how to say drink, Da (grandpa) , duece (our dog) , papa (food) , dada (dad) , mama & keys. We live with my parents & little better & we are constantly talking to him & telling him what stuff is & since hurricane Harvey flooded our home we now stay with a family member who has 3 kids ages 7,5&16months so the 2 older ones are always playing & talking to both the boys & im hoping being around them also he can pick up some words . Although the 16month old doesn't really talk just babbles & only knows how to say my sons name & doesn't walk or stand .