Move Irish text to phonetic ipa conversion upstream.
Irish (Gaeilge) tts works if correct IPA syntax is used when sending the request for tts with the IPA option included.
Ba chuid mhór den togra seo teacht ar ábhar a bheadh chomh maith nó níos fearr ná an fhuinseog agus an t-ábhar a bheith níos inmharthana.
translated to IPA..
"bˠɑː xɪdʲ woːˈr dʲəɴʲ tʲɔɡˈrə ʃoː tʃæxt eˈr ɑːwəˈr ɑː vʲəh xɔv mˠɑːh ɴˠoː ɴʲiːsˠ fʲæˈrr ɴˠɑː en ɪɴʲʃoːɡ əɡʊsˠ en tʲɑːwəˈr ɑː vʲeɪh ɴʲiːsˠ ɪɴʲwəˈrhɑːɴˠɑː"
The IPA (irish) text can be read and spoken accurately by Neural EN-GB or EN-US voice.
I have attached a file that converts Irish sentences into IPA text. Suggest that this conversion from Irish text to IPA text should be available at Microsoft server side so that tts for irish (Gaeilge) would be available for everyone. Please see attached example of irish Gaeilge tts MP3 using this method.
The script attached converts irish to IPA has room for improvement but mostly gives good enough output for intelligible speech.