English(英语) - I love you
Afrikaans(南非洲的荷兰语) - Ek het jou lief
Albanian(阿尔巴尼亚) - Te dua
Arabic(阿拉伯(对男性) - Ana behibak (to male)
Arabic(阿拉伯(对女性) - Ana behibek (to female)
Armenian(亚美尼亚) - Yes kez sirumen
Bambara(班拉族语) - M'bi fe
Bulgarian(保加利亚) - Obicham te
Cambodian(柬埔寨) - Soro lahn nhee ah
Cantonese Chinese(广东话) - Ngo oiy ney a
Catalan(加泰罗尼亚语) - T'estimo
Cheyenne(夏安语) - Ne mohotatse
Chichewa(齐佩瓦语) - Ndimakukonda
Corsican(科西嘉语) - Ti tengu caru (to male)
Creol(克利奥尔语) - Mi aime jou
Croatian(克罗地亚语) - Volim te
Czech(捷克) - Miluji te
Danish(丹麦) - Jeg Elsker Dig
Dutch(荷兰) - Ik hou van jou
Esperanto(世界语) - Mi amas vin
Estonian(爱沙尼亚) - Ma armastan sind
Ethiopian(埃塞俄比亚) - Afgreki'
Faroese(法罗语) - Eg elski teg
Farsi(波斯语) - Doset daram
Filipino(菲律宾) - Mahal kita
Finnish(芬兰) - Mina rakastan sinua
French(法语) - Je t'aime, Je t'adore
Gaelic(盖尔语) - Ta gra agam ort
Georgian(乔治亚州) - Mikvarhar
German(德语) - Ich liebe dich
Greek(希腊) - S'agapo
Gujarati - Hoo thunay prem karoo choo
Hiligaynon - Palangga ko ikaw
Hawaiian(夏威夷语) - Aloha wau ia oi
Hebrew(希伯来语(对女性) - Ani ohev otah (to female)
Hebrew(希伯来语(对男性) - Ani ohev et otha (to male)
Hiligaynon - Guina higugma ko ikaw
Hindi(北印度语) - Hum Tumhe Pyar Karte hae
Hmong - Kuv hlub koj
Hopi(霍皮语) - Nu' umi unangwa'ta
Hungarian(匈牙利) - Szeretlek
Icelandic(冰岛) - Eg elska tig
Ilonggo - Palangga ko ikaw
Indonesian(印度尼西亚) - Saya cinta padamu
Inuit(纽因特语) - Negligevapse
Irish(爱尔兰) - Taim i' ngra leat
Italian(意大利) - Ti amo
Japanese(日本) - Aishiteru
Kannada(埃那得语) - Naanu ninna preetisuttene
Kapampangan - Kaluguran daka
Kiswahili(斯瓦西里语) - Nakupenda
Konkani - Tu magel moga cho
Korean(韩语) - Sarang Heyo
Latin(拉丁语) - Te amo
Latvian(拉托维亚语) - Es tevi miilu
Lebanese(黎巴嫩) - Bahibak
Lithuanian(立陶宛) - Tave myliu
Malay(马来语) - Saya cintakan mu / Aku cinta padamu
Malayalam(马拉雅拉姆语) - Njan Ninne Premikunnu
Mandarin Chinese(汉语) - Wo ai ni
Marathi(马拉地语) - Me tula prem karto
Mohawk(莫霍克语) - Kanbhik
Moroccan(摩洛哥) - Ana moajaba bik
Nahuatl(纳瓦特尔语) - Ni mits neki
Navaho(纳瓦霍语) - Ayor anosh'ni
Norwegian(挪威) - Jeg Elsker Deg
Pandacan - Syota na kita!!
Pangasinan - Inaru Taka
Papiamento(帕皮阿门托语) - Mi ta stimabo
Persian(波斯语) - Doo-set daaram
Pig Latin(大拉丁语) - Iay ovlay ouyay
Polish(波兰) - Kocham Ciebie
Portuguese(葡萄牙) - Eu te amo
Romanian(罗马尼亚) - Te ubesk
Russian俄语) - Ya tebya liubliu
Scot Gaelic(苏格兰盖尔语) - Tha gra\dh agam ort
Serbian(塞尔维亚语) - Volim te
Setswana - Ke a go rata
Sign Language(手语) - ,\,,/ (represents position of fingers when signing'I Love You')
Sindhi - Maa tokhe pyar kendo ahyan
Sioux(苏族语) - Techihhila
Slovak(斯洛伐克语) - Lu`bim ta
Slovenian(斯洛文尼亚语) - Ljubim te
Spanish(西班牙语) - Te quiero / Te amo
Swahili(斯瓦西里语) - Ninapenda wewe
Swedish(瑞典) - Jag alskar dig
Swiss-German(瑞典德语) - Ich lieb Di
Tagalog(塔加拉族语) - Mahal kita
Taiwanese(台湾话) - Wa ga ei li
Tahitian(大溪地语) - Ua Here Vau Ia Oe
Tamil(泰米尔语) - Nan unnai kathalikaraen
Telugu - Nenu ninnu premistunnanu
Thai(泰语(对男性) - Chan rak khun (to male)
Thai(泰语(对女性) - Phom rak khun (to female)
Turkish(土尔其) - Seni Seviyorum
Ukrainian(乌克兰) - Ya tebe kahayu
Urdu(乌尔都语) - mai aap say pyaar karta hoo
Vietnamese(越南(对女性) - Anh ye^u em (to female)
Vietnamese(越南(对男性) - Em ye^u anh (to male)
Welsh(威尔士语) - 'Rwy'n dy garu
Yiddish(意第绪语) - Ikh hob dikh
Yoruba - Mo ni fe
参考资料：http://zhidao.baidu.com/question/386788.html