When you search for "X pronunciation" on Google, it shows the "Sounds like x·y·z" box with phonetic respelling. Does anyone know if this respelling system is based on a particular dictionary or established phonetic notation for British/American English?
It seems to be a custom system developed by Google. Wikipedia lists it as the "Google pronunciation dictionary" scheme in its table of pronunciation respellings.
In particular, Google spells the SQUARE vowel as ehr, which is not used in any other system in Wikipedia's table.
I spent some time trying to find more information, but found nothing conclusive, not even in the Google speech-to-text or translation APIs.
I also found that the pronunciation respelling system described on Wikipedia doesn’t match Google’s results:
Converting the IPA spelling to Google’s system for representing phonemes:
pruh nuhnsi eishuhn
But in the actual Google search engine results:
pruh nuhn see ay shn
There is a noticeable difference in these results.
Did anyone else find more information?