Hot answers tagged kana
According to standard orthography (post-reform) no words are ever written with を, except names and words whose writers exercise "artistic license". But I don't think in your case it's a misspelling, rather a conscious choice of adhering to pre-reform orthography. (かつお was かつを before the spelling reform.) Opposed to new nonsense uses, like ヲタク (or ワヰン), I ...
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