The same as in English: America.
"You are Welsh" = Rwyt ti'n Gymreig
No change - its America.
'Our Friends' in Welsh is 'Ffrindiau Ni' :)
To say "your house" in Welsh, you would say "eich tŷ".
No country in South America speaks welsh, however there may be a few welsh speakers living or visiting South America. Welsh is spoken in Britain.
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."
in welsh its 'mae croeso'