mispronounces some words

Checks

• This template is only for research question, not usage problems, feature requests or bug reports.
• I have thoroughly reviewed the project documentation and read the related paper(s).
• I have searched for existing issues, including closed ones, no similar questions.
• I am using English to submit this issue to facilitate community communication.

Question details

Hello, I fine-tuned the F5 model for the Persian language with 100 epochs, and 60 h data but it still mispronounces some words that are even present in the training data. Where could the problem be?