If an English word does not exist in the lexicon, we split it into characters. For instance, if the word TTS does not exist in lexicon.txt, we split it into 3 characters T, T, and S.
If an English word does not exist in the lexicon, we split it into characters. For instance, if the word TTS does not exist in lexicon.txt, we split it into 3 characters T, T, and S.