Gariad
"You are Welsh" = Rwyt ti'n Gymreig
Russell Howard's girlfriend is Cerys Morgan Welsh. As of early 2014 they live in Leamington Spa, which is in England.
'Our Friends' in Welsh is 'Ffrindiau Ni' :)
To say "your house" in Welsh, you would say "eich tŷ".
Cymraeg
No in Welsh is dim.
"y diwedd" is how you say it in Welsh language.
In Welsh, you would say "Rwy'n cytuno" to say "I agree."
Draig Gymreig
You can say "it's nice" in Welsh as "mae'n braf."
Great > [Welsh] mawr
"Egg" in Welsh is "wy".