In quite a few languages, 3rd person singular pron has only one form. Out of curiosity, I searched online and found some of those. It takes time for them to switch between He and She in speaking English.
I hope English will eventually use only one form too in the future. :D

English: he, she
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Chinese: ta, ta
Finnish: han, han
Turkish: o, o
Hungarian: o, oe
Kurdish: ew, ew
Urdu: wo, wo
Persian: u, u