“Filler words” are a natural part of speech. Those types of words happen in every language and region, but differ from language to language and region to region. So in the USA they tend to say “um”, whereas in Australia we say “mm”. Some other places they say “err”. You can use any word you like because filler words have no meaning but just indicate a pause. Little fads happen – so “like” as a filler word is a fad that goes back in time, but became really popular in the 80’s due to the Valley girl thing.
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