Didn't know where to post this as it's both Irish and Scottish.

Trailer:
http://www.youtube.com/watch?v=vogX7MuhNIQ

Song:
Julie Fowlis - Tha Mo Ghaol Air Aird A' Chuain
http://www.youtube.com/watch?v=x6Xa1sh5qeo

They edited the song for the trailer, these are the lines they went with:


So, as an exercise, I tried to put it into Gaeilge (retaining poetic word choices to preserve meter)

Feascar ciúin an dtús a' Bhealtaine
Dlúth do ribíní donn na bláth-shúil
Ba a croí le grá go scáineadh
Nuair a ghlac mé féin ar lámh í
"Síob do dheora, do ghrá 'tá sábháilte
Fhill mé slán, bhárr aird a' chuain."

Notes from Dineen
- Feascar = Vespers
- ribín = ribbon, but also "lock of hair"

Misc Notes & Questions
- aird a' (ar? ag?) chuain = beyond the harbour?
- Céit = old-irish beginning of summer?
- I don't understand the usage of bhárr in the last line. The line is "air àird a' chuain" in every verse prior, then it switches here and I'm stumped.

Finally! A red-haired Disney princess! I can die content!

Redwolf

air àird a' chuain = on the high seas ("on the height of the sea")
Although cuan means "bay" in Irish, I think it can mean "sea" in some dialects (Ulster?) and that's what it means in Gaelic. They use bàgh for "bay" (usually, but there are some other terms as well).

bàrr means "the very top" , so it means something more like "on the very crest of the high seas"
Technically, the expression would be a bhàrr air .... The "a" seems to be dropped for poetic reasons (that happens a lot in Irish songs as well), so the "b" stays lenited.

The full lyrics can be found here:
http://www.celticlyricscorner.net/fowlis/tha.htm


In both Irish and Scottish Gaelic, the names of the months are fairly recent. The Gaels did not traditionally divide the year into 12 months, but seasons or other periods of time based on their activities or the weather (in Gaelic, the current name for December is an Dùbhlachd, meaning something like "the blackness"). Different areas might have different names. For example, Cèitean is the accepted term for May in Scotland now, but some people use[d] Màigh (obviously borrowed from English).

One other note is that bha is the Scottish Gaelic form of the Irish bhí, so Bha a cridh' le gaol gu sgàineadh would be Bhí a croí le grá go scáinead [Ba also exists in Gaelic, but is unchangeable as in Irish].

_________________
I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.

Tuigim anois. Tapadh leat!

So, this more or less look like a faithful translation from one to the other?

Feascar ciúin an dtús a' Bhealtaine
Dlúth do ribíní donn na bláth-shúil
Bhí a croí le grá go scáineadh
Nuair a ghlac mé féin ar lámh í
"Síob do dheora, do ghrá 'tá sábháilte
Fhill mé slán, bhárr ard aigéan."

As far as I can tell, your translation looks good, but I'll let the fluent Irish speakers rule on that. Obviously, there's some poetic license being taken with the spelling, word choice, and sentence structure (do ghaol tha sàbhailt = tha do ghaol sàbhailte / Bha a cridh' le gaol gu sgàineadh = Bha a cridh' a' sgàineadh le gaol), although some of it might be dialectical (the Gaelic dialects have mostly merged, but there are lots of old remnants in songs, poetry, and older writings, and in some people's speech).

_________________
I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.