Change the dialect

Good morning,
Some time ago, in a previous software version, I changed the Audio Prompts to English in dialect option. Later, I discover that this option was not working correctly. The voice announces English words with the language defined in the watch (they are different, in my case). I discover this only after a new software version was installed, that removed the dialect option, so I can’t change the dialect.
Any ideas how to solve this bug?
TIA