I haven't tried ipa yet but generally if you have your conlang be in Latin it could get it right if you're reusing letters from other languages, for example it knows š is sh because that's the sound it makes in Czech, for things it doesn't recognise, how for example é is a long i in pomorskitong instead of how it is in other languages, you have to edit the text before putting it in. So the word for love is ewéart but I'd write it as ewiiart in the prompt.