Oh and by the way,in the last verse it's Admiral's barge, not pouch.

The chorus, as Mike wrote it, is:

Sing me a shanty,
Canta del Cabo San Vicente
Chantez des Marins du Nile   
Sing a hymn of Trafalgar.

Mike's pronunciations are,

hee-air-ah (hyeres)
maran du neeler (marins du Nile)

But, hey, this is folk.

oll an gwella,

Crowdercref