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Why is English interjection 'eh' spelt thus?
Why's the interjection eh spelt thus, even though it's pronounced "ay" /eɪ̯/ with the ꜰᴀcᴇ vowel? While the spelling ⟨eh⟩ isn't too common in English in the first place, I generally associate it with ᴅʀᴇss /ɛ/. That seems to be its use when spelling out onomatopœia too (meh, heh). Similarly, the Wikipedia English respelling key which is used to indicate pronounciation of English terms alongside IPA, uses ⟨eh⟩ to write ᴅʀᴇss /ɛ/ too, why I assume it to be the "expected" pronounciation.
I found this very confusing as a kid in New Zealand! I did not realise, reading British books, that 'eh' was that interjection - kid me just assumed it was some weird olden days thing English people said. Most people in New Zealand spell it as "ay". I don't know why "eh" is standard?