How do your children speak at 1.5 years old? My language is babbling a…

How do your children speak at 1.5 years old? My language is babbling and still speaking directed to dad, giraffe, au au, Titia, Tai Tai, cabbage and potatoes says ka, no says and hides something, while speaking, kozy (in Kazakh means eye), shows all body parts. Knows basic fruits and vegetables, animals. Today said agash and banana clearly. Sometimes it will say something clearly, but then forgets everything. I don't know if it's normal or already something to take action now.