I experience the same for English (US and UK). Another issue is that it only announces euro's in English but not the cents.I use a NumberFormatter with currency style and usesGroupingSeparator = false. E.g., €1,645.45 is announced as "One thousand six hundred forty five euro's dot forty five". Do you experience the same? I would expect "One thousand six hundred forty five euro's and forty five cents"

Turned out that this is not a bug of the OS but the use of semanticContentAttribute in code which was set to .forceRightToLeft. Since iOS 15 VoiceOver is responding to that as well.

As long as your element has a trait .button (and UIButtons and their subclasses have that by default), users will hear it's a button and they know they need to double tap to activate it. The hint is not provided by default and not needed. Only when you have a custom element that a user might not know how to use, you can provide a hint how to activate it. But it's better to explain in a hint what will be the result of the action and not repeat the control. They should also start with a verb (not a command) e.g., "Download the document.", "Plays the song." or "Displays your accounts."