Really? What if that person is impeccably hot, reasonably priced, and checks all your boxes except for English fluency? I agree that if he can't even carry out basic dialogues and has to rely on translation apps, then it will be a major turnoff for me too. But what if the English is comprehensible with basic vocabulary and perhaps just some broken grammatical structures here and there? Is that still unacceptable to you?
Oddly enough, on a separate note, I find certain foreign accents very erotic and arousing, especially when the accented and/or foreign words are uttered uncontrollably at the peak of activities. That actually somewhat incentivizes me to learn his language to understand what he just says to me...... 😉