I have seen all major dialogues being fully translated on Yua. There really are some untranslated dialogues here & there but those are really minor & should not affect your gameplay nor during H-scenes.
Are you playing the uncensored version on the drive folder?
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If so, then that's exactly why you're missing the translations.
Icevail only works on launch version & does not work on uncensorship or transferring his translations to updated version of the games.
If you want those translations, gotta play the censored one.