For Japanese, I would test names, loanwords, and sentence endings early. Those are the places where a draft often needs manual cleanup before it sounds natural.
Keep sentences listener-friendly
Japanese writing can contain long clauses. For audio, consider shorter sentence boundaries so learners and viewers can follow the meaning.
Review particles and names
Small grammar markers matter in Japanese listening. Test important lines to make sure the rhythm supports comprehension.
Use TTS for repeated exposure
Students can replay the same sentence several times, compare it with the written form, and practice shadowing at a comfortable speed.
Before you publish
- Split long clauses
- Test names and loanwords
- Use repeatable practice lines
- Match voice speed to learner level
Multilingual quick notes
A simple way to try it
Start with one short paragraph from your own project. If the sample sounds clear, keep that version of the script and then record the full MP3. It is much easier to fix one paragraph early than repair a long file at the end.