cymru am byth
We would normally say Cymru am byth (Wales forever). That is what you hear at rugby matches.
In Wales, you can say "hwyl fawr" to say goodbye in Welsh.
MamguIn south Wales mam-gu; in north Wales nain.
Caru Cymru
Bord smwddio is Welsh for 'ironing board'.See "BBC Wales - Welsh at home".
Mae Cymru'n Cwl
Y Gamp Lawn
Dwi yn caru cymru
I know for a fact that people in Wales are called Welsh.
Yes, the noun 'Welsh' is a word for the people of Wales. The word 'Welsh' is also an adjective, a word to describe something as of or from Wales.
Le gallois (from Pays de Galles meaning Wales).
Coed y Cadno (south Wales); Coed y Llwynog (north Wales).