After independence, Dutch was dropped as an official language and replaced by Malay. Yet the Indonesian language inherited many words from Dutch: words for everyday life as well as scientific and technological terms. One scholar argues that 20% of Indonesian words can be traced back to Dutch words, many of which are transliterated to reflect phonetic pronunciation e.g. kantoor (Dutch for "office") in Indonesian is kantor, while bus ("bus") becomes bis. In addition, many Indonesian words are calques on Dutch, for example, rumah sakit (Indonesian for "hospital") is calqued on the Dutch ziekenhuis (literally "house of the sick"), kebun binatang ("zoo") on dierentuin (literally "animal garden"), undang-undang dasar ("constitution") from grondwet (literally "ground law"). These account for some of the differences in vocabulary between Indonesian and Malay.

What became the official language of Indonesia after they declared their independence?