[roetlich]

And that's fine, a lot of sounds are hard to distinguish if you're not familiar with that language. For English, here's a dictionary entry: https://dictionary.cambridge.org/dictionary/english/moment Showing IPA for both US and UK: it's a slightly different diphthong. For German and Italian (I think), it shouldn't be a diphthong at all. Not everyone will hear a difference, which makes it even more helpful to precisely define what the sound should be. Or just don't put any rules in your instructions, or tell people that it's flexible or whatever.