DESCRIPTION:
IF YOUR LANGUAGE IS NOT FEATURED then that would not be my fault because I only added the lyrics and translation. The compilation itself was made by Disney (so it's official). Personally though I do wish Finnish and Turkish (among others) were included.
I completed this like 2 months ago and uploaded it but it got blocked worldwide. Seeing other people have managed to upload subtitle/translation vids for this, I've decided to re-upload mine.

Also DISCLAIMER: VIDEO IS PROPERTY OF DISNEY, I only contributed by adding lyrics and translation to it but am not making profit out of this.

I would like to thank, among others, the Reddit community (particularly Reddit user Azberg) since I acquired a lot of the translations/lyrics there (http://www.reddit.com/r/videos/comments/1vstov/frozens_let_it_go_sung_in_25_different_languages/cewc7no). I also acquired translations from other YouTube videos, and some of my friends.

Alright, lyrics (if anything's wrong, tell me and I'll correct it):
English
The snow glows white on the mountain tonight, not a footprint to be seen

French
Un royaume de solitude, ma place est là pour toujours
A kingdom of solitude, my place is here forever

German
Der wind er heult so wie der Sturm ganz tief in mir
The wind, it howls, like the storm deep inside of me

Dutch
Het werd mij te veel, hoe ik mijn best ook deed
It was too much for me, no matter how hard I tried

Mandarin
别让他们进来, 看见, 做好女孩, 就像你的从前 (Bié ràng tāmen jìnlái, kànjiàn, zuò hǎo nǚhái, jiù xiàng nǐ de cóngqián)
Don't let them in or see, be a good girl, like you were before

Swedish
Visa ingenting, vad du än gör, allt är förstört
Show nothing, whatever you do, everything is destroyed

Japanese
有りのままの姿見せるのよ (ari no mama no sugata miseru no yo)
I will show how I really am

Latin Spanish
Libre soy, libre soy, libertad sin vuelta atrás
I am free, I am free, freedom of no return

Polish
Wszystkim wbrew, na ten gest mnie stać
Against everyone, I can afford this gesture

Hungarian
Jöjjön száz orkán, és közben a szívemen ül a jég
Come hundreds of windstorms, and meanwhile my heart is wrapped in ice

Castilian Spanish
Desde la distancia que pequeño todo es
It is the distance, how small everything looks

Catalan
I les pors que em dominaven, per sempre han fugit
And the fears that dominated me, have fled away forever

Italian
Non è un difetto, è una virtù, e non la fermerò mai più
It's not a fault, it's a virtue, and I won't hold it ever again

Korean
내 맘대로 자유롭게 살래 (nae mamdaero jayurobge sallae)
I want to live freely on my own

Serbian
Sad je kraj, sad je kraj, na krilima vetra sam
It's over, it's over, I am on the wings of the wind

Cantonese
誰亦要全心講? 忘掉昨天悲歌 (Seoi6 jik6 jiu3 cyun4 sam1 gong2, mong4 diu6 zok3 tin1 bei1 gor1)
Who also wants to speak from their heart? Forget the sorrow songs of yesterday

Portuguese
Estou aqui, e vou ficar, venha a tempestade
Here I am, and here I'll stay, let the storm come

Malay
Kuasaku buat hidup bercelaru
My powers make life go haywire

Russian
Подвластны мне мороз и лёд, ну что за дивный дар (Podvlastny mnje moroz i ljod, nu chto za divnyj dar)
Frost and ice obey me, what a divine gift!

Danish
Og som krystaller står en tanke ganske klar
And one thought stands clear as crystal

Bulgarian
Ще спра да бъда аз на миналото в плен (Shte spra da bada az na minaloto v plen)
I will stop being captive to the past

Norwegian
La den gå, la den gå, jeg skal stige lik solen nå
Let it go, I shall rise like the sun, now

Thai
ปล่อยออกมา เลิกซ่อนเร้น, เด็กดีไม่เห็นมีค่า (Ploi ok ma loek son ren, dek di mai hen mi kha)
Released, stop hiding, the good girl is worthless

Quebecois
Je suis là, comme je l'ai rêvé
I am here, like I dreamed it

Flemish
En de storm raast door, de vrieskou daar zat ik toch al niet mee
And the storm rages on, the cold has never bothered me