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

Bengali - Ami tomake bhalobashi (pronounced: Amee toe-ma-kee 
bhalo-bashee)

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

Cherokee - Tsi ge yu i (Thanks Nancy!)

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 - Amin mela lle (from The Lord of The Rings, by J.R.R. Tolkien) 

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 h⬤ 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 

Hebrew (Thanks Lilach)

Hebrew to male: "ani ohev otcha" (said by male) "Ohevet 
ot'cha" (said by female)

Hebrew to female: "ani ohev otach" (said by male) "ohevet 
Otach" (said by female) Hiligaynon - Guina higugma ko ikaw
Hindi - Hum Tumhe Pyar Karte hae

Hmong - Kuv hlub koj

Hopi - Nu' umi unangwa'ta

Hungarian - Szeretlek(Thanks D