The Hobbit language is based on Irish, I used Google Translate for my translations. All names and sentences written in Italics are in the Green Tongue.
Prologue
It had been a good many centuries since a member of the Royal Family Took had Presented, that is to say been born with Fae – commonly known as Fairies – features. It was a closely guarded secret that the rumours of fairy blood in the Royal Family were actually true. Not that Hobbits were untrustworthy, but tongues will wag and Big-Folk were often greedy and dangerous.
On this day the 22nd of September 1290 S.R. Prince Uilliam Ghlac-An Mála was born. There was awed silence as Thain Gerontius held his minutes-old grandson and murmured "Tsí-Cineál, Fae-Kind." Gerontius examined his grandson revealing split pupils and downward curving ears – not the upwards curving of Hobbit ears – the babe also had small nubs on his shoulder blades and tiny pointed tips on his incisors that were already poking out of his gums.
Gerontius placed the now wrapped babe in his daughter Belladonna's waiting arms. "Fáilte a chur roimh Uilliam Ghlac-An Mála chuig an Ghlac Teaghlaigh," she whispered pressing a kiss to the babe's forehead.
Belladonna passed Uilliam to her husband Bungo who also whispered, "Fáilte a chur roimh Uilliam Ghlac-An Mála chuig an An Mála Teaghlaigh," and pressed a kiss to his forehead.
FIVE YEARS LATER
"Uilliam," Mama called from the back door.
Young William Baggins called back, "Tá mé ag teacht Mhamaí!" before saying good-bye to his small animal friends. Old Badger had new grand-kits and William thought they were adorable, he loved to cuddle them and tell them stories. William also liked to play with the older kits, they liked playing hide and seek. William was so excited about the new kits that he just had to tell Mama, because Mama loves baby animals almost as much as William, he ran up to his Mama yelling, "Mhamaí! Mhamaí! Sean Broc tá chlann clainne!"
His Mama laughed, "Iontach!" and hugged William, "Anois, tá mé duine éigin ba mhaith liom tú chun freastal ar, tá sé ina chara d'aois."
"Ó do chuid eachtraí?" William asked excited. "É aige col ceathrar bás a fháil ar ard?"
"Uimh Uilliam ar sé ina Draoi. Is é ina ainm Gandalf." Belladonna smiled guiding the excited child indoors.
"A Draoi!" William exclaimed.
That evening after William had been put to bed, Gandalf lit his pipe and said, "Young William is Fae-Kind, is he not?"
Belladonna breathed in sharply, "No one must know Gandalf. Swear you won't tell anyone!"
"I promise my dear Belladonna. I will protect and guide him, for the rest of his days."
"Good, now tell me, how fares Elrond?" Belladonna asked taking a sip of tea.
SEVEN YEARS LATER
William, who was now commonly called Bilbo by his friends, was twelve when the small nubs on his shoulder blades began to swell painfully. After six months Bilbo had a set of fully functional wings sprouting from his back. They were akin to butterfly wings in that they had two distinct parts to each wing and were translucent. They were a subtle mix of blue and green with golden edging. Though functional his wings were still small enough to fold down and hide under his clothes, but when Bilbo's emotions were heightened he was unable to keep them folded.
FOUR YEARS LATER
Prince Bilbo was sitting at his writing desk, he was learning about the duties of Lord Baggins, a title he would inherent when his father died. "Uilliam," A soft but masculine voice called from behind him.
Bilbo whipped round and bared his fangs at the unknown voice at his back, "Cé thusa? Conas a fuair tú a fháil i anseo?" Bilbo asked for he distinctly remembered locking his door. The being behind him smiled softly, Bilbo lost all fear and anger when he saw the sun shining through the beings blue and green wings, "Tsí!" he whispered amazed.
"Is ea Uilliam, Tá mé an Tsí-Sinsear. Is féidir leat glaoch orm Seanmháthair Fedlimid." The Fae for that was what he was, smiled again. "Tá mé anseo chun múineadh tú de stair do agus oidhreacht. Beidh mé ag múineadh tú freisin chun tú féin a chosaint ar na bealaí traidisiúnta ár ndaoine."
That was the first but by no means last visit from the Tsí-Sinsear. Bilbo learned many things under his tutelage and was better for it.