Many of the commonest words of English are pronounced in a special reduced way, by Brits, Americans & others. Even in careful, formal speech. Even by famous, admired speakers.

Fry’s English Delight:
https://www.bbc.co.uk/programmes/p00x…

Judi Dench in Westminster Abbey:
https://www.youtube.com/watch?v=Hw9fP…

The Queen:
https://www.youtube.com/watch?v=2klmu…

Tom Hiddleston reading Byron’s poem:
https://www.youtube.com/watch?v=X1nVV…

[…]