And aren't you glad he is speaking? Aren't you grateful that he cares enough to talk? Isn't it good to know that "the LORD tells his secrets to those who respect him" (Ps. 25:14)?
My Uncle Carl was grateful that someone spoke to him. A childhood case of the measles left him unable to hear or speak. Nearly all of his sixty-plus years were lived in stony silence. Few people spoke his language.
My father was one of them. Being the older brother, maybe he felt protective. After their father died, perhaps he felt he should take over. Whatever the reason, my dad learned sign language. Dad wasn't an avid student. He never finished high school. Never went to college. Never saw the need to learn Spanish or French. But he did take the time to learn the language of his brother.
Let Dad enter the room, and Carl's face would brighten. The two would find a corner, and the hands would fly, and they would have a great time. And though I never heard Carl say thanks (he couldn't), his huge smile left no doubt that he was grateful. My dad had learned his language.
Your father has learned to speak your language as well. "It has been given to you to know the mysteries of the kingdom of heaven" (Matt. NKJV). Think a word of thanks to him would be appropriate? And while you're at it, ask him if you might be missing any signs he is sending your way.
It's one thing to miss a message from your wife about cleaning up a room. It's something else entirely to miss one from God about the destiny of your life.