How to maintain a consistent Irish accent in video narration?

Hi All

Hoping someone can help. The Irish accent I was using in a video has been retired so I am replacing it all.

I have switched to a English UK voice, (Aoede, multilingual, Gemini) and added into the instructions: soft Irish accent.

A couple of things I am struggling with:

1 - When I click apply to all, the instructions do not get added on to every voice, therefore the first scene is Irish, the rest are English.

2 - When I go through an manually update the speech to include ‘soft Irish accent’, the voice sounds different on every scene, making it sound like multiple narrators.

Can anyone give any tips on how to either make the voice a more consistent / Irish accent throughout, or to update the whole video in bulk which includes my instructions set?

Thanks in advance!