Mae'n hyfryd cael bod yma.
'Hyfryd' is Welsh for 'lovely'
Formal: Dewch yma. Dere 'ma.
Gobeithio byddech yn cael penblwydd da.
Rydym yn cyfarfod yma.
you can't translate englsish phrases into welsh as you can words... so instead you could say , "byswn i'n dwlu taset ti yma" = i'd love it if you were here
Dynes hyfryd
diwrnod hyfryd.
cael diwrnod da
Ges i amser hyfryd.
"You are Welsh" = Rwyt ti'n Gymreig
'I am English' in Welsh is 'Dwi yn Saesneg'
You can say "Tud yma, boi!" (tid uh-ma boy) which is what I'd say, or if you wanna use the proper word for "boy" in Welsh then it's "bachgen" but it's less of a mouthful to say "boi", heh.