If you want to force a certain pronunciation, you can use SSML phoneme tags. We support both IPA and CMU. However, we have found that CMU, with the current implementation, seems to be a bit more predictable, consistent, and better overall. You can find out more about this in our guide to Prompting.
This is available on the following models:
- English v1
- Turbo v2
- Flash v2
Alternatively, a workaround is to find an alternative spelling and write a word more phonetically. You can employ various tricks such as capital letters, dashes, apostrophes, or even single quotation marks around a single letter or letters.
As an example, a word like "trapezii" could be spelt "trapezIi" to put more emphasis on the "ii" of the word.