Sometimes, fiction matters.

Now with a Spanish translation by Spaniard Kiwi!

Princess Luna wants to regain her sister's trust, but when Celestia begins to finally be honest with her, things start to change.

This story has a Live Reading, you can find it here:

http://www.tllps.tk/

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

An unfortunate event gives Princess Celestia a fresh view on her life by forcing her to see the world from a very different viewpoint. With Equestria changing around her, she is faced with a personal crisis... if she can ignore how cute a certain lavender unicorn suddenly looks to her.

Featured on Equestria Daily!
And some site about horse porn!
Liked this story? Read the sequel.
And the story this was a sort-of prequel to.

After a full day in Canterlot, Twilight and Rarity decide to explore the palace garden's legendary hedge maze. Their attempts to unravel the mysteries of the labyrinth yield some interesting and unexpected results.

Luna has returned to Equestria, but she is as cold and distant as the moon that held her captive. Celestia broods on her throne, regretting mistakes made and prices paid. Twilight Sparkle contemplates betrayal, and as her faith drains away, bitterness takes its place. And in the darkness, a relic of an ancient tragedy watches, his life consumed by greivances that he can neither remember nor forget. Betrayed and betrayers all, four ponies in need of a redemption that only one seeks. Will Honesty be enough to save them? Can one hoof, extended in trust and forgiveness, mend four wounded hearts?

Includes Applejack X Luna and slight Twilight X Celestia shipping.

With thanks to my editors, peppermint-roo.deviantart.com and sosweetntasty.deviantart.com

Written prior to season 2, so severely jossed by canon.

Many, many things have occurred throughout Equestria's existence, even before ponies were as intelligent as Princess Celestia and Princess Luna. But what all is there worth knowing about? We don't know, but Twilight Sparkle does, the studious pony that she is! It's time we discovered more about Equestria in general, from the earliest times of civilization to the most deeply-hidden secrets only revealed to Celestia's most gifted student, by Celestia herself.

When one of Twilight's spells goes horribly wrong, the implications prove disastrous. Her horn is damaged, one of her friends is sorely affected, and the rest of Ponyville may be at great risk. It's now up to Twilight to figure out how to fix everything before it's too late.

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.

As proud as she was of her royal duties, the nights in Canterlot often left Luna bored and lonely - remembering her troubled past as Night Mare Moon made it no easier. Determined to clear her head, the Princess of the Night decides to take a night-time stroll - making new friends and discovering things about herself in the process.

The cover image is from the wonderful John Joseco, on Deviant Art. I take no credit for it.