Swedish and Norwegian languages also/still use "barn" for "child".

It's Scottish or maybe northern English - "nowt" is more common south of the border but "bairn" is more common in scotland. The fun thing is that we also use "wean" (wee one) as another common word for "child" but with a completely different etymology.

Whilst I am from Southern UK, I live in the North East UK. Accents here are strong and vary quite a bit. DO NOT confuse a Geordie for a Mackem (or vice versa) at all!

It is interesting that there is a lot of slang that I had never heard befote moving here, but slang from the South is more widely known. A coworker suggested getting 'ket' for a meeting. I did not know 'ket' here means sweets (candy)...

Unfortunately the accent on that audio file is strongly US to my ear.

I googled and got “In North-Eastern English dialect, ‘shy bairns get nowt’ is a well-known idiom that essentially translates to ‘shy children get nothing’. Often used to encourage children (or adults) to speak up and have self-confidence”. The original commenter gidorah has a UK email address. https://www.wordsense.eu/shy_bairns_get_nowt/ looked like a reasonable reference.

Edit: here’s it said proper good - skip to 42 minutes: https://m.youtube.com/watch?v=UaErbstVKAQ Aside: The transcript feature on YouTube is amazing but the UX is soooooo frustrating - the feature doesn’t exist on iPad Safari - and the text is not searchable on YouTube iPad App.