One question please
when a child learns to talk and he is going to say words, shall we use this sentence?
孩子要谈话了？

Question

One question please
when  a child learns to talk and he is  going  to  say words,  shall  we use this  sentence? 
孩子 要 谈话 了？

Answer

谈话 is more formal. We can say 孩子要开始说话了

Answer

孩子開始會說話了

Answer

“谈话” is a very formal word and is a noun,  you can use the word "说话” instead.

Answer

谈话 is not fit。 “孩子要开口说话了。”