Pronunciation.

I saw this feature on elevenreader but that app is way too expensive. The ability to highlight a single word and change the pronunciation. This is useful for names especially. Also if a book is in English but has words from another language (Japanese in this case) the pronunciation is waaaay off. Especially the names. Maybe a feature where you can say this document has multiple languages and then select which ones are included so the AI doesn't get “overwhelmed”.