Linguists demonstrated long ago that children have an innate language-acquisition ability. As long as they are immersed in a language, they will learn it naturally. Speaking the mother tongue is actually beneficial to childhood development.
其實語言學家早已證實孩子天生擁有語言學習的能力，只要浸淫其中，便可自然而然地學習，「說母語」反而可以幫助兒童發展。