OOV : Out-Of-Vocabulary, words that machine does not know. Subword segmenation : It is a preprocessing by separating one word into multiple subwords. Because words often consist of a combination of meaningful subwords (Ex : birthplace=birth+place). : A special character at the end of a word BPE(Byte Pair Encoding) It finds the most frequently appeared character pairs and merges them into one cha..
