Declan
Thiocfadh leat = You could ..., Thiocfadh liom = I could
Thiocfainn = I would come
Tchífidh mé = I will see (same as "feicfidh mé"), Scots Gaelic would be chí mí (I'm not bothering to change the direction of the "fada" stroke)

Michael R - I think Martin Ryan has a good command of written Irish (I've had emails in Irish from him, have not spoken with him)

I don't have the song to listen to it, and I think Capercaillie tends to use so much accompaniament that it makes it difficult to listen for words!