Lojban has a whole repertoire of particle words that express emotions. This idea is from Lojban's mother Láadan. In Lojban, "au" means desire and "ai" means intent. There are many others. Vling is much simpler. An exclamatory sentence ends with "mak1" for strong emotion or with "lei1" for soft emotion. A command ends with "au1" and a polite request ends with "ei1" simply. The numeral "1" indicates a low level tone. Vling tries to be simple.
Source: tatoeba (10704866)