Say "I love you" in multiple languages

AFRIKAANS ek het jou lief / ek is lief vir jou
ALBANIAN të dua
ALSATIAN ir liàb dir
ARABIC ouhibouk / n'bghick (dialectal Arabic)
ARMENIAN yes siroum em kez
ASTURIAN quiérote
AZERI men seni sevirem
BAMBARA né bi fè
BASQUE maite zaitut
BAOULE mi klôa
BELARUSIAN Кахаю цябе (kahaju ciabie)
BENGALI aami tomakey bhalo basi
BERBER righ kem
BOBO ma kia bé nà
BOSNIAN volim te
BRETON karout a ran ac'hanout / da garout a ran / me az kar
BULGARIAN обичам те
BURMESE nga nin ko chit te
CATALAN t'estimo
CHEYENNE néméhotâtse
CHINESE wo ai ni
CORSICAN amu tè / ti tengu caru
CROAT volim te
CZECH miluji tě
DANISH jeg elsker dig
DIOULA mi fê
DUTCH ik hou van jou
ESPERANTO mi amas vin
ESTONIAN ma armastan sind
FINNISH minä rakastan sinua
FLEMISH ik hou van jou / ik heb je lief /'k zie je graag
FRENCH je t'aime
FRISIAN ik hâld fan dy
FRIULAN o ti vuei ben
GALICIAN quérote
GEORGIAN me shen mikvarkhar
GERMAN ich liebe Dich
GREEK s'agapo
GUARANÍ rojhayhû
GUJARATI hun tane prem karun chhun
HAITIAN CREOLE mwen renmen'w / mouin rinmin'w
HAWAIAN aloha wau ia oi
HEBREW ani ohev otakh (man to woman)
ani ohevet otkha (woman to man)
HINDI main tumse pyar karta hoo
HUNGARIAN szeretlek
ICELANDIC ég elska þig
INDONESIAN saya cinta padamu / saya cinta kamu
IRISH GAELIC tá grá agam duit
ITALIAN ti amo
JAPANESE aishitemasu / aishiteru (barely used) / Watashiwa anataga sukideso / anata ga daisuki desu ("cute")
KABYLIAN hamlagh-kem (man to woman)
hamlaghk (woman to man)
KANNADA naanu ninnanna pritisutteney
KHMER bang srolaïgn ôn (man to woman)
ôn srolaïgn bang (woman to man)
KINYARWANDA ndagukunda
KOREAN saranghe
KURDISH ez te hez dikim
LAO khoi hak tchao lai
LATIN te amo
LATVIAN es tevi mīlu
LEBANESE b'hibik (man to woman)
b'hibak (woman to man)
LIGURIAN mi te amu
LINGALA na lingi yo
LITHUANIAN aš tave myliu
LOW SAXON ik hou van ju
LUXEMBOURGEOIS ech hun dech gäer
MACEDONIAN sakam te
MALAGASY tiako ianao / tia anao aho (stronger)
MALAY aku cinta padamu
MALTESE inhobbok
MANX ta graih aym ort
MAORI kei te aroha au i a koe
MONGOLIAN Би чамд хайртай (bi chamd khairtai)
MORÉ mam nong-a fo
NAPOLETANO t'ammo
NDEBELE niya ku tanda
NORWEGIAN jeg elsker deg
OCCITAN t'aimi
PAPIAMENTU mi ta stima bo
PERSIAN dustat dâram (formal) / duset dâram (informal)
POLISH kocham cię
PORTUGUESE eu te amo / amo-te (informal)
PUNJABI mein tenu pyar karda han (male speaker)
mein tenu pyar kardi han (female speaker)
QUECHUA de CUZCO munakuyki
RAPA NUI hanga rahi au kia koe
ROMANI kamaù tut
ROMANIAN te iubesc
RUSSIAN Я тебя люблю (ia tibia lioubliou)
SAMOAN ou te alofa ia te oe
SARDINIAN deo t'amo (logudorese) / deu t'amu (campidanese)
SCOTTISH GAELIC tha gaol agam ort / tha gaol agam oirbh
SERBIAN volim te
SHONA ndinokuda
SINDHI moon khay tu saan piyar aahay
SLOVAK lùbim ta
SLOVENIAN ljubim te / rad te imam (male speaker) / rada te imam (female speaker)
SOBOTA volim te / se te volime (lit.)
SOMALI waan ku jecelahay
SPANISH te amo / te quiero
SUSU ira fan ma
SWAHILI nakupenda
SWEDISH jag älskar dig
TAGALOG mahal kita
TAHITIAN e here nei vau ia oe
TAJIKI jigarata bihrum duhtari hola (man to woman)
tra lav dorum (woman to man)
TAMIL naan ounnai kadali-karen
TATAR min sine yaratam
TELUGU nenu ninnu premisthunnanu
TETUN hau hadomi o
THAI ผมรักคุณ (phom rak khun) - man speaking
ฉันรักคุณ (chan rak khun) - woman speaking
TIBETAN na kirinla gaguidou
TURKISH seni seviyorum
TURKMEN seni söýärin
UDMURT mon tone jaratiśko
UKRAINIAN Я тебе кохаю (ia tebe kohaiu)
URDU mein tumse mohabbat karta hoon (man to woman)
main tumse mohabbat karti hoon (woman to man)
mujhe tum se pyar heh
UZBEK seni sevaman
VENETIAN t'amo
VIETNAMESE anh yêu em (man to woman)
em yêu anh (woman to man)
WALOON (orthographe à betchfessîs) dji vs voe voltî
WELSH rydw i'n dy garu di
WEST INDIAN CREOLE mwen enmen
WOLOF nob nala
YIDDISH ich hob dir lib

Actually, it is:
PORTUGUESE (Portugal): Eu amo-te / Amo-te (informal)
PORTUGUESE (Brazil): Eu te amo / Te amo (informal)

Note: In most regions of Brazil the 'te' and the 'ti' is said like 'tchee'; that doesn't happen in Portugal. (Well, it did... up until the XVII century.)

Hindi:
mein tumse pyaar karta hoon (male to female)
mein tumse pyaar karti hoon (female to male)

Malayalam:
njan ninne premikkunnu

Japanese:
watashiwa anatano koto wo aishite imasu.
watashiwa anatano koto ga suki desu.

Neo-Melanesian Pidgin Mi laikim iu tumas!
Polish: Kocham cie - (ko-ham chie)
Australian: I reckon you're a real good sort!
New Zealand: Baa-a-a...

Rasta:

Ilie bulla-bwai, come yah fo braata, mon.

How DO you say "I love you" in Rasta? Other than the Patois-Jamaican "Mi luv yuh"?

I do so admire and respect Sozobe's signature: for too many people, reality is another and invisible world!

!!!!!!!!!Ranoooooooooooooooooooooooooooooon!!!!!!!!!!!!!!!!!!!!!!!!!!
Arabic - انا بحبــــــــــــــــــــــــــــــــــــــــــــــك
English - I love you
Afrikaans - Ek het jou lief
Albanian - Te dua
Arabic - Ana behibak (to male)
Arabic - Ana behibek (to female)
Armenian - Yes kez sirumen
Bambara - M'bi fe
Bangla - Aamee tuma ke bhalo aashi
Belarusian - Ya tabe kahayu
Bisaya - Nahigugma ako kanimo
Bulgarian - Obicham te
Cambodian - Soro lahn nhee ah
Cantonese Chinese - Ngo oiy ney a
Catalan - T'estimo
Cheyenne - Ne mohotatse
Chichewa - Ndimakukonda
Corsican - Ti tengu caru (to male)
Creol - Mi aime jou
Croatian - Volim te
Czech - Miluji te
Danish - Jeg Elsker Dig
Dutch - Ik hou van jou
Elvish (from The Lord of The Rings, by J.R.R. Tolkien)- "Amin mela lle" (thanks Becca!)
Esperanto - Mi amas vin
Estonian - Ma armastan sind
Ethiopian - Afgreki'
Faroese - Eg elski teg
Farsi - Doset daram
Filipino - Mahal kita
Finnish - Mina rakastan sinua
French - Je t'aime, Je t'adore
Frisian - Ik hâld fan dy
Gaelic - Ta gra agam ort
Georgian - Mikvarhar
German - Ich liebe dich
Greek - S'agapo
Gujarati - Hoo thunay prem karoo choo
Hiligaynon - Palangga ko ikaw
Hawaiian - Aloha Au Ia`oe (Thanks Craig)
Hebrew - Ani ohev otah (to female)
Hebrew - Ani ohev et otha (to male)
Hiligaynon - Guina higugma ko ikaw
Hindi - Hum Tumhe Pyar Karte hae
Hmong - Kuv hlub koj
Hopi - Nu' umi unangwa'ta
Hungarian - Szeretlek
Icelandic - Eg elska tig
Ilonggo - Palangga ko ikaw
Indonesian - Saya cinta padamu
Inuit - Negligevapse
Irish - Taim i' ngra leat
Italian - Ti amo
Japanese - Aishiteru
Kannada - Naanu ninna preetisuttene
Kapampangan - Kaluguran daka
Kiswahili - Nakupenda
Konkani - Tu magel moga cho
Korean - Sarang Heyo
Latin - Te amo
Latvian - Es tevi miilu
Lebanese - Bahibak
Lithuanian - Tave myliu
Luxembourgeois - Ech hun dech gنer (Thanks Nadine! x2)
Malay - Saya cintakan mu / Aku cinta padamu
Malayalam - Njan Ninne Premikunnu
Mandarin Chinese - Wo ai ni
Marathi - Me tula prem karto
Mohawk - Kanbhik
Moroccan - Ana moajaba bik
Nahuatl - Ni mits neki
Navaho - Ayor anosh'ni
Norwegian - Jeg Elsker Deg
Pandacan - Syota na kita!!
Pangasinan - Inaru Taka
Papiamento - Mi ta stimabo
Persian - Doo-set daaram
Pig Latin - Iay ovlay ouyay
Polish - Kocham Ciebie
Portuguese - Eu te amo
Romanian - Te iubesc
Russian - Ya tebya liubliu
Scot Gaelic - Tha gra\dh agam ort
Serbian - Volim te
Setswana - Ke a go rata
Sign Language - ,\,,/ (represents position of fingers when signing'I Love You')
Sindhi - Maa tokhe pyar kendo ahyan
Sioux - Techihhila
Slovak - Lu`bim ta
Slovenian - Ljubim te
Spanish - Te quiero / Te amo
Swahili - Ninapenda wewe
Swedish - Jag alskar dig
Swiss-German - Ich lieb Di
Surinam - Mi lobi joe
Tagalog - Mahal kita
Taiwanese - Wa ga ei li
Tahitian - Ua Here Vau Ia Oe
Tamil - Nan unnai kathalikaraen
Telugu - Nenu ninnu premistunnanu
Thai - Chan rak khun (to male)
Thai - Phom rak khun (to female)
Turkish - Seni Seviyorum
Ukrainian - Ya tebe kahayu
Urdu - mai aap say pyaar karta hoo
Vietnamese - Anh ye^u em (to female)
Vietnamese - Em ye^u anh (to male)
Welsh - 'Rwy'n dy garu di
Yiddish - Ikh hob dikh
Yoruba - Mo ni fe

Greek: S'agapo
(pronounced sa-ga-po)

Ahhh-hh YES! lOVE

S'gapo po gyee..... very much

Benvenuto, A-glow!

Anche ti voglio bene!

Dutch: Ik hou van je.

SLOVAK: MILUJEM ŤA

Italian: Voglio ti bene

The literal translation comes out weird but that's how certain dialects say it

Chinese
I love You= 我爱你 （wo ai ni)

The Macedonian way of saying "I love you" isn't "Te sakam", as someone posted. Te sakam means "I like you." I am Macedonian, and learned it before I learned English...but to this day, I still don't know how to say "I love you." Damn shame...

Dialetto romano (very low class...): M'arisulti
Quenya: Tye-mèla

Havnt read all but heres my contribution,hope its not a repeat.

Japanese-Watashi ai anata
Watashi (I) ai(love)anata(you)
they are seperate word but there may be a more common phrase used.

Could it be that Macedonians say "Ljubim te" for i love you?