Mandarin is an aboriginal group in Taiwan, inhabiting the country in recent times as well. The language spoken by them has similarity with their name. In fact, the Chinese officials in Taiwan and on Chinese mainland used the language extensively during mutual conversation.
Mandarin derived its name from the common, everyday language in Beijing. The name was imported to Taiwanese and Chinese land through Portuguese settlers who invaded both the regions and inhabited there for a couple of time. Basically, "Mandarin" is a Sanskrit word, which etymologically stands for "commander". In ancient times, the Portuguese used the term extensively, to refer to both the Chinese and Taiwanese population and their respective languages.
The Mandarin population in Taiwan is known to communicate in this particular language named after them. However in modern times, this age-old practice has gained familiarity not only in Taiwan but also in a handful of other Asian and South-East Asian countries like China, Malaysia, Singapore, etc. The present picture is that along with indigenous Mandarin people, their language has turned out to be the main official language in governmental sectors, educational institutions and media offices simultaneously in Taiwan and China. In fact, they are an integral part of around 870 million Mandarin speaking people in both the countries.
Apart from China and other countries, about 20 million people in Taiwan alone use Mandarin in daily conversation. As one of the original and primitive class of people, the greatest influence exerted by the Mandarins is, on written Chinese language, which is completely based upon spoken Mandarin language.