Afrikaans - haai (hello)
Albanian - tungjatjeta
A'Leamona - tél nìdõ (good day)
Arabic - subbah-el-kheir
mArHAbAn (Hello) pronounced Mar-ha-ban
Armenian - barev or parev
Austria = Grüßgott
Azerbaijani - salam (hello)
Bahamas – hello (formal)
Basque - kaixo
Bavarian and Austrian German - grüß Gott
Bengali — aas salamu alaay kum  zdrasti
Burmese - mingalarba
Cambodian - Sour Sdey
Cape-Verdean Creole - oi, olá
Catalan - hola
Chamorro - hafa adai
Chichewa - moni bambo!
Chinese - 你好
Congo - mambo
Cree - Tansi
Croatian - bok
Czech - dobré ráno
Danish - hej
D'ni - shorah
Double Dutch - hutch-e-lul-lul-o
Dutch - hoi  
English - hello
Esperanto - saluton
Estonian - tere päevast
Egyptian Arabic - Salaam Alekum'
Fijian - 'Bula Uro'
Finnish - hyvää päivää
Gaelic - dia duit
German - hallo  
Greek - yia sou
Hausa - Ina kwaana
Hawaiian - aloha
Hebrew - shalom
Hindi - नमस्ते,
Hungarian, Magyar - jó napot  
Icelandic - góðan dag
Igbo - nde-ewo
Italian - ciào
Japanese - おはよう　ございます　ohayoou gozaimasu
Jamaican(slang)- Yow Wah gwaan
Kanien'kéha (Mohawk) - kwe kwe
Kannada - namaskara
Kazakh - Salem
Klingon - nuqneH?
Latin (Classical) - salve
Latvian - labdien, sveiki, chau
Lingala - mbote
Lithuanian - laba diena
Lojban - coi
LOLcat - Ohai!
Luxembourgish - moïen
Macedonian - Здраво
Maldivian (Dhivehi) - kihineth
Maltese - merħba
Maori - kia ora
Marathi - namaskar
Mongolian - sain baina uu
Nahuatl - niltze, hao
Navajo - ya'at'eeh
Niuean - faka lofa lahi atu
Neapolitan - cia, cha
Nepalbhasha - Jwajalapa, ज्वजलपा
Nepali - namaskar, namaste, k cha
Northern German - moin moin
Northern Shoto - dumelang
Norwegian - hei
Oshikwanyama - wa uhala po, meme
Persian - salaam or do-rood
Pig Latin - eyhay
Polish - dzień dobry
Portuguese - oi, boas, olá or alô
Punjabi - sat sri akal
Rajasthani (Marwari)- Ram Ram
Romanian - salut, buna dimineata
Russian - Privet!
Samoan - talofa
Scanian - haja go'maren (morning), go'aften (evening)
Scottish, hi (informal) hello the noo (hello)
Senegal - salamaleikum
Serbian - zdravo, ćao (
Sinhala - a`yubowan (
Slovak - dobrý deň
Slovenian — živjo
South African English - hoezit
Spanish - hola
Sulka - marot
Swahili - jambo
Swedish - tja
Swiss German - hallo
Tahitian - ia orana
Tamil - vanakkam
Telugu- namaskaram
Tetum (Timor - Leste) - bondia (morning), botarde (afternoon), bonite (evening)
Thai - sawa dee-ka (said by a female), sawa dee-krap (said by a male)
Tongan - malo e lelei
Tshiluba - moyo
Tsonga (South Africa) - minjhani
Turkish - merhaba selam
Ukranian - dobriy ranok
Ung Tongue - Hello
Urdu - adaab ir salam
Vietnamese - xin chào
Welsh - shwmae
Yiddish - sholem aleikhem
Zulu - sawubona