In the mesolect, local words and phrases for which there are English equivalents may also used like "tidak apa" or "ulu". In the basilect, the use of local terms may be extensive even if most words used are English, and local expressions or exclamations such as "alamak" often form part of the speech. In the first half of the 20th century, Malaysian English was similar to British English but spoken with a Malaysian accent. However, in the postcolonial era (since 1957), the influx of American TV programmes has influenced the usage of Malaysian English. There is no official language board, council or organisation to ensure the correct and standard usage of Malaysian English because after independence, Malay replaced English as the official language. The University of Cambridge Local Examinations Syndicate continues, however, to set and mark the GCE O-Level English Language "1119" paper, which is a compulsory subject for the Malaysian Certificate of Education (the English Language paper set by the Malaysian Ministry of Education is the same as the English Language "1119" paper for GCE O-Level). To a large extent, Malaysian English is descended from British English, largely because of the country's colonisation by Britain from the 18th century. However, influence from American mass media, particularly in the form of television programmes and films has made most Malaysians familiar with many American English words. For instance, both "lift/elevator" and "lorry/truck" are understood, but the British form is preferred. Only in some very limited cases the American English form more widespread: "chips" instead of "crisps", "fries" instead of "chips" and "diaper" instead of "nappy". Some words and phrases used in Malaysia have different meanings than in British or American English. Malaysian English has its own vocabulary, which comes from a variety of influences. Typically, for words or phrases that are based on other English words, the Malaysian English speaker may be unaware that the word or phrase is not used in British or American English. Such words are also present in the vocabulary of some continuums of Singapore Standard English. Many words of Malay origin have made it into the standard form of Malaysian English used in the media, literature and formal speech. For example, Menteri Besar (Malay for Chief Minister) even has a plural form in English - Menteri"s" Besar. Particles in Malaysian English come from the influence of Chinese and Malay.