The term Welsh descent refers to having ancestors who were Welsh.
Yes. You can have Afro-American direct family (parents, grandparents) and be born in Wales.
Of course, if one of your parents or other ancestors is Welsh and one is Portuguese.
'gyda dy Gymraeg di' is 'with your Welsh'
The Welsh language emerged in the 6th century and is still in use.
Egactly the same reson u would do with English