to convince someone who might doubt the sentence. Dia datang lah - expresses a high level of certainty. Dia datang lho - could be translated as She comes, you know. Dia datang ah - expresses hesitancy; could be translated as I think she/he comes. Dia datang dooong - expresses hesitancy; could be translated as I wish she'd come or Please let her come Dia datang deng - used to correct what was wrong; could be translated as She came apparently Dia datang deh - used to emphasize that 'finally' the person is coming, or in different intonation and context, it is used to emphasize a condition for proposing a request, for instance in a context of: 'She will come too, so please also come with us' Dia datang, lagi or Dia datang pula - expresses annoyance, exasperation, or general displeasure; could be translated as She/he comes, too?Particles can also be used to introduce questions. The following examples could both be translated as How could she come?: Kok, Dia datang? - used when the speaker finds the sentence difficult to believe. Lho? Dia datang - indicates surprise or disbelief. Vocabulary evolution Pre-1980sKumpul kebo literally means 'water buffalo-style gathering' or 'gather like cattle'. It originated during the Dutch colonial era and was known as koempoel gebouw, from koempoel 'to gather' and Dutch gebouw 'building', thus the phrase means to live together under the same roof (as an unmarried couple). Confusion has caused this term to be linked with Javanese kebo 'buffalo'. This term basically means that two people in a relationship are living together without being married, i.e. in a domestic partnership or a de facto relationship. To kumpul kebo in Indonesia is considered immoral and sometimes illicit. For these reasons and also those relating to religion, Asian culture, and general ethics, it is often frowned upon in modern Indonesian society to do such a thing. 1980s The 1980s was the era of bahasa prokem. At this time slang language vocabulary was formed by the insertion of the infix -ok-, creating a totally new word. Prokem itself is a prokem word from préman.Prokem words created by reducing the ultima, then inserting the infix -ok- before the vocal of the penult (which is now become the ultima). If the penult is an open syllable, the penult taking the nearest consonant after it as its coda. If the word is monosyllabic, the infix simply