I'd assume he is speaking Welsh rather than mumbling his words. Is he so protective over his native language as it seems improbable he can't speak English.
I'd like to bury the funeral woman and that Geordie idiot underground in a coffin, lets see if they can get it on there. Don't you hate people who think their sex lives are going to interest everyone.
I can assure you he isn't speaking Welsh....at least no Welsh I've ever heard of
Top programme, another winner from Ruth Jones IMO