Teaching AI to pronounce terms added to transcribe

I'm wondering how to teach Premiere how to pronounce words and terms added to the transcribing dictionary. I see and have used the feature allowing you to add a word or term to the transcriber dictionary. I don't know what the transcriber then does with the term: if I'm adding something that wasn't in the default language pack, then is the AI taking my added word and searching for it - pronunciation and usage - in a larger, more universal dictionary?

And that actually doesn't matter when, in my case, my company uses industry and internal acronyms. For example, we regularly use the acronym "FHIR", which is pronounced like the word "Fire". This means that Premiere's auto-transcriber needs to add the term FHIR, understand it's a homophone for "fire", then know when to use FHIR and when to use Fire contextually. For now, I'm assuming the best workflow for me would be to search the transcript for the word "fire" and probably need to replace it each time with FHIR. I'm trying to find the fastest workflow for reviewing and correcting transcripts, as most of our webinars are an hour long, so reviewing the transcript and then the captions after editing the video would triple the time required for turnaround.