Here are the lyrics plus the translation (I attempt to sing it now n then!)

Bidh Clann Ulaidh
Luaidh sa lurain
Bidh Clann Ulaidh
Air do bhanais
Bidh Clann Ulaidh
Luaidh sa lurain
Deanamh an dans'
Air do bhanais.

Bidh clann a righ
Bidh clann a righ
Bidh clann a righ
Air do bhanais
Bidh clann a righ
Seinnear a phiob
Olar a fion
Air do bhanais.

Bidh Clann Amhlaidh
Nam feachd greannmhor
Bidh Clann Amhlaidh
Air do bhanais
Bidh Clann Amhlaidh
Nam feachd greannmhor
Deanamh an dans'
Air do bhanais.

Bidh Clann Choinnich
Nam feachd soilleir
Bidh Clann Choinnich
Air do bhanais
Bidh Clann Choinnich
Nam feachd soilleir
Deanamh an dans'
Air do bhanais.

Translation:
The clans of Ulster
My darling one, my precious
The clans of Ulster
Will be at your wedding
The clans of Ulster
My darling one, my precious
Will be dancing at your wedding.

The family of the king
The family of the king
The family of the king
Will be at your wedding
Pipes will be played
Wine will be drunk
At your wedding.

The MacAulay Clan
With the lively followers
Will…etc

The MacKenzie Clan
With the bright followers
Will…etc