In fact , I didn't train him intentionally but will always talk with him and sometime ask him to follow me to say, he know what I am saying and do it. He will answer my questions like 得/唔得/食蛋蛋.... and sing song " twinkle twinkle little stat"........ he can sing few sentence. I will say GOOD BOY with big smile whenever he can do my instruction. He love to hear it so much.
I feel every baby's development is different I know many baby start to talk at 2 years old. Like my son he never climb and only can walk smoothly at 14 months , I feel his physical development no so good but nothing can push him just let it be and encourage him to move more.