Most Hakka speak Taiwanese and Mandarin, and some speak Japanese. After World War II the mainland Chinese-run government made Mandarin the official language, and it was used in the schools and in government. With democratization, other languages or dialects became more popular.

Is Chinese and Taiwanese the same language?

The languages Taiwanese use traditional characters in all written Chinese. Standard Chinese, which is a form of Mandarin Chinese, is the official language of China, and although there are differences between it and the Chinese spoken in Taiwan, both are quite similar. China is also home to many languages and dialects.