Tried language through TV with my kids. The experiment with the first kid was an accident. She used to watch Chhota Bheem a cartoon in Hindi. Within a couple of months she was able to understand and speak Hindi though none of us spoke the language at home. She was 3 years old.
With the next kid we sort of experimented. We never spoke in English to him. But he has picked it up by just watching Peppa pig on you tube. He is 2.5 years old now.