1. Mae hen wlad fy nhadau yn annwyl i mi,
Gwlad beirdd a chantorion, enwogion o fri;
Ei gwrol ryfelwyr, gwladgarwyr tra mâd,
Tros ryddid gollasant eu gwaed.

Chorus:
Gwlad, Gwlad, pleidiol wyf i'm gwlad,
Tra môr yn fur i'r bur hoff bau,
O bydded i'r heniaith barhau.

2. Hen Gymru fynyddig, paradwys y bardd;
Pob dyffryn, pob clogwyn, i'm golwg sydd hardd,
Trwy deimlad gwladgarol, mor swynol yw si,
Ei nentydd, afonydd, i mi.

3. Os treisiodd y gelyn fy ngwlad dan ei droed,
Mae hen iaith y Cymry mor fyw ag erioed,
Ni luddiwyd yr awen gan erchyll law brad,
Na thelyn berseiniol fy ngwlad.

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What do the lyrics mean?
The song talks of Wales' rich heritage and culture of poetry, music, patriotic heroes, linguistic pride and, of course, Wales' inimitable landscape. It translates as the following:

1. This land of my fathers is dear to me
Land of poets and singers, and people of stature
Her brave warriors, fine patriots
Shed their blood for freedom

Chorus:
Land! Land! I am true to my land!
As long as the sea serves as a wall
For this pure, dear land
May the language endure for ever.

2. Old land of the mountains, paradise of the poets,
Every valley, every cliff a beauty guards;
Through love of my country, enchanting voices will be
Her streams and rivers to me.

3. Though the enemy have trampled my country underfoot,
The old language of the Welsh knows no retreat,
The spirit is not hindered by the treacherous hand
Nor silenced the sweet harp of my land.