yn wir, mewn gwirionedd
"You are Welsh" = Rwyt ti'n Gymreig
If Moira is a form of Mary the Welsh equivalent would be Mari/Mair. Names aren't really 'translated' though.
'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".