Definition
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llongyfarch
Cyfarchiadau neu ddymuniadau da i rywun ar ôl llwyddo neu gyflawni rhywbeth.
Greetings or best wishes to someone after succeeding or achieving something.
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Llongyfarchiadau ar dy radd, mae'n gelwydd gwych!
Congratulations on your graduation, it's a great achievement!
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Llongyfarch ar dy ben-blwydd, gobeithio y byddi di'n cael diwrnod gwych!
Congratulations on your birthday, I hope you have a great day!
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Mae'n rhaid i mi llongyfarch ti am ennill y gystadleuaeth hon!
I must congratulate you for winning this competition!