<P> Indonesian is the official language of the Republic of Indonesia, thus its usage is encouraged throughout the Indonesian archipelago . It's regulated in Chapter XV, Constitution of Indonesia 1945 about the flag, official language, coat of arms, and national anthem of Indonesia . Also in Chapter III, Section 25 to 45, Government regulation No. 24 / 2009 specifically mentions the status of the Indonesian language . </P> <P> The national language shall be Indonesian </P> <P> Indonesian functions as a symbol of national identity and pride, and is a unifying language among the diverse Indonesian ethnic groups . It also serves as a vehicle of communication among the Indonesian provinces and different regional cultures in Indonesia . The language is used as the national official language, the language of education, communication, transaction and trade documentation, the development of national culture, science, technology, and mass media in Indonesia . </P> <P> According to Indonesian law, the Indonesian language was proclaimed as the unifying language during Sumpah Pemuda on 28 October 1928, developed further to accommodate the dynamics of Indonesian civilization . As mentioned previously, the language was based on Riau Malay, though linguists note that this is not the local dialect of Riau, but the Malaccan dialect that was used in the Riau court . Since its conception in 1928 and its official recognition in 1945 Constitution, the Indonesian language has been loaded with a nationalist political agenda to unify Indonesia (former Dutch East Indies). This status has made the Indonesian language relatively open to accommodate influences from other Indonesian ethnic languages, most notably Javanese as the majority ethnic group in Indonesia, and Dutch as the previous colonizer . Compared to the indigenous dialects of Malay spoken in Sumatra and Malay peninsula or the normative Malaysian standard, the Indonesian language differs profoundly by a large amount of Javanese loanwords incorporated into its already rich vocabulary . As a result, Indonesian has wider sources of loanwords, compared to Malaysian Malay . It is sometimes said that the Indonesian language is an artificial language made official in 1928 . By artificial, it means that Indonesian was designed by academics rather than evolving naturally as most common languages have, in order to accommodate the political purpose of establishing an official unifying language of Indonesia . By borrowing heavily from numerous other languages it expresses a natural linguistic evolution; in fact, it is as natural as the next language, as demonstrated in its exceptional capacity for absorbing foreign vocabulary . </P>

What became the unifying nationalist language of indonesia