It’s marvellous to read in so many threads how many people are discovering all about Wales through their discovery of the language, so for those interested in “lists”, I thought I’d post this.
One of the books I refer to a lot for work is this one - Reference Wales by John May (it’s in English)
It is a little behind the times now (published in 1994, so there is a lot of recent info missing), however it is still a fascinating resource if you’re into facts and figures about Wales.