You can say "I am Welsh" by simply stating "I am Welsh" in English. In Welsh, you would say "Cymraeg ydw i" (I am Welsh).
'Our Friends' in Welsh is 'Ffrindiau Ni' :)
To say "your house" in Welsh, you would say "eich tลท".
Cymraeg
"Na" is the word for "no" in Welsh.
"y diwedd" is how you say it in Welsh language.
I think it might be Welsh actress Bethan Wyn Hughes who used to be on welsh soap opera Rownd a Rownd.
In Welsh, you would say "Rwy'n cytuno" to say "I agree."
Welsh dragon in Welsh is "draig Goch".
You can say "it's nice" in Welsh as "mae'n braf."
Daeargi Cymreig
"She is" would be "mae hi" in Welsh.