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

Gwlad, gwlad, pleidiol wyf i'm gwlad.

Tra mor yn fur i'r bur hoff bau,

O bydded i'r hen iaith barhau.

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.

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

Translation

Land Of My Fathers

O land of my fathers, O land of my love,
Dear mother of minstrels who kindle and move,
And hero on hero, who at honour's proud call,
For freedom their lifeblood let fall.

Wales! Wales! O but my heart is with you!

And long as the sea

Your bulwark shall be,

To Cymru my heart shall be true.

O land of the mountains, the bard's paradise,
Whose precipice, valleys lone as the skies,
Green murmuring forest, far echoing flood
Fire the fancy and quicken the blood.

For tho' the fierce foeman has ravaged your realm,
The old speech of Cymru he cannot o'erwhelm,
Our passionate poets to silence command
Or banish the harp from your strand.

The above is a fairly free translation in verse. A more literal translation would be:

The Old Land Of My Fathers

The old land of my fathers is dear to me,
Land of poets and singers, famous men of renown;
Her brave warriors, very good patriots,
For freedom shed their blood.

Land, land, I'm for my land.

While the sea is a wall to the pure, dear country,

O let the old language [sc. Welsh] continue.

Old mountainous Wales, paradise of the poets,
Every valley, every cliff is beautiful to my sight.
Through patriotic feeling, so charming is the murmur
Of her brooks, rivers, to me.

If the enemy oppresses my land under his foot,
The old language of the Welsh is as alive as ever.
The muse is not hindered by the hideous hand of treason,
Nor [is] the melodious harp of my country.

Another possible translation is:

The Land Of My Fathers

The land of my fathers is dear unto me,
Old land where the minstrels are honored and free;
Its warring defenders so gallant and brave,
For freedom their life's blood they gave.

Home, home, true am I to home,

While seas secure the land so pure,

O may the old language endure.

Old land of the mountains, the Eden of bards,
Each gorge and each valley a loveliness guards;
Through love of my country, charmed voices will be
Its streams, and its rivers, to me.

Though foemen have trampled my land 'neath their feet,
The language of Cambria still knows no retreat;
The muse is not vanquished by traitor's fell hand,
Nor silenced the harp of my land.