"I guess that's why I find the bi-lingual road signs over the border north of Berwick absurd, just as I would road signs in dialect."

I'm really not sure what you are referring to. I live in the area you are talking about and there are basically no bilingual road signs apart from at some of the border crossings themselves where the welcome to Scotland signs etc are displayed in Gaelic too. I still don't really get why you seem to have a problem with those? Apart from those - and in the Borders we're are only actually talking about two situations at Lamberton and Carter Bar - there is no bilingual signing in the area either in Gaelic or Scots.