When we drive from Cheshire to Pembrokeshire, there are language clues that remind us that we have crossed the border from England into Wales.
There have been numerous studies that show how good language learning is for the brain.
One aspect of such research shows that bilingual children ‘notice’ better how language works and outperform monolingual children in tasks linked to language awareness, such as distinguishing whether a sentence is grammatically well-formed from whether it is truthful.
But the benefits go even further, as Dr Alexopoulou explained: “Studies show that a bilingual child is better able to cope with tasks that involve attention, memory and concentration. The mental gymnastics needed to constantly manage two or more linguistic systems increases cognitive flexibility and makes learning easier.”
– See more at: http://www.cam.ac.uk/research/news/bilingualism-is-good-for-learning
In the light of these findings, I’m full of admiration for these new parents who, resident in Wales but of recent Scottish/English origin, have decided to bring their baby up bilingual in English and Welsh.
Go on. Find a spare ten minutes and read about their adventure here.
Tegfan, Dinas Cross 
A few months ago, my husband and I went on a big UK road trip. I was mesmerized by all of the signs in Wales and at one cafe, the couple sitting next to us was speaking in Welsh. It was beautiful to listen to and we were unashamed about eavesdropping. Of course, we had no clue what they were talking about, we just enjoyed hearing it!
I’m so pleased you came to Wales! Not many visitors to the UK get this far and many come and go and think that the UK = England. I’m glad you enjoyed your stay. If you picked up a few words of Welsh you might find that you’ll be able to use them again if you ever get to Brittany, where the local language is very similar.
My husband is from England and we had six weeks in the UK while he had to deal with some VISA paperwork. We did a 3300 mile road trip- which included John O’Groats and Land’s End…and much in between! I really loved Hay-on Wye in Wales!
Wow! Thank you so much for your kind words!
Good luck with your endeavours! I’m sure baby will be grateful; you’re offering him a wonderful gift.