I speak Thai belonging to Sino-Tibetan language (Chinese, Japanese, Korean..).

In Sino-Tibetan language, we mostly use tongue to construct the sound, we use very little air from lung to make sound. But when we learn English, we have to change & use a lot of air from lung, try to make it nasally & sometimes blow out the air to make sound. If we don't do that then noone can understand our English.

That is very curious to me. There must be a reason behind that, is that because the European living in cold climate that they often blow off a lot of air from the lung out to limit the cold weather & gradually they construct the sound via that way?

Speaking English by using air from lung costs me a lot of energy, I often feel very tired when speaking English continuously for 1 hr!