Arabic - صباح الخير (good morning)pronounced sabahou el kheir , مساء الخير (good evening) pronounced masaou el kheir : note that Kh-خ is pronounced from the back of the throat. mArHAbAN-مرحبا (Hello) pronounced Mar-ha-ban
Bulgarian - zdravei, zdraveite (to many), zdrasti (informal), Dobro utro (morning), Dobar den (day), Dobar vecher (evening)
Burmese - mingalarba
Cambodian (Khmer)- Sua s'dei (informal), Jum Reap Sour (formal), good morning, Arun Sua s'dei, good afternoon Tivea Sua s'dei, good evening Sayoan Sua s'dei, good night Reatrey Sua s'dei, good bye Lea Hoy (informal), Jum Reap Lea (formal)
Cape-Verdean Creole - oi, olá, Entao or Bon dia
Catalan - hola (pronounced o-la), bon dia (pronounced bon dee-ah)good morning, bona tarda (bona tahr-dah) good afternoon, bona nit (bona neet)good night. You can also say just "Bones (bo-nahs) to make it informal.
Chamorro - hafa adai (hello/what's up?), hafa? (informal), howzzit bro/bran/prim/che'lu? (informal), sup (informal)and all other English greetings
Chichewa - moni bambo! (to a male), moni mayi! (to a female). Muribwanji (moori-bwanji) is used often, as a generalized greeting to everyone.
Chinese - In both Cantonese and Mandarin, it is written as 你好. Cantonese is nei* ho or lei ho (pronounced ne ho or lay ho) and Mandarin is nǐ hǎo (pronounced, nee how) (remember the tones). In Mandarin, you can also say 早上好 (zǎo shàng hǎo) for "Good Morning." *as in eee not a
Congo - mambo
Cook Island - Kia orana (hello)
Cree - Tansi (pronounced Tawnsay)
Croatian - bok (informal), dobro jutro (morning), dobar dan (day), dobra večer (evening), laku noć (night)
Czech - dobré ráno (until about 8 or 9 a.m.), dobrý den (formal), dobrý večer (evening), ahoj (informal; pronounced ahoy)
Danish - hej (informal; pronounced hey), god dag (formal), god aften (evening; formal), hejsa (very informal).
Egyptian Arabic - Salaam Alekum'(sulam ulakume) (Goodbye) Ma Salaama (ma sulama) the "U" is pronounced its usual way(Example:up)
Fijian - 'Bula Uro' (Informal Hello) and 'Bula Vinaka' (Formal Hello) is pronounced 'Buh-la Vina-kah'
Finnish - hyvää päivää (formal), moi, terve or hei (informal), moro (Tamperensis)
French - salut (informal; silent 't'), bonjour (formal, for daytime use; 'n' as a nasal vowel), bonsoir (good evening; 'n' is a nasal vowel), bonne nuit (good night)
Gaelic - dia duit (informal; pronounced gee-ah ditch; literally "God be with you")
Georgian - gamardjoba
German - hallo (informal), Guten Tag (formal; pronounced gootan taag), Tag (very informal; pronounced taack).
Gujarati - Namaste,Namaskar,Kemcho
Greek - γεια σου (pronounced yah-soo; singular to greet a friend, informal), γεια σας (plural to be polite, formal)(it means "health to you"), καλημέρα (pronounced kalimeera; good morning; formal), καλό απόγευμα (pronounced kalo apoyeevma; good afternoon; formal), καλησπέρα (pronounced kalispeera; good evening; formal)
Hausa - Ina kwaana? (How did you sleep? - informal) or Ina uni? (how's the day? - informal). Ina kwaanan ku? (formal) or Ina unin Ku (formal)
Hawaiian - aloha (pronounced ah-low-ha)
Hebrew - shalom (means "hello", "goodbye" and "peace"), hi (informal), ma kore? (very informal, literally means "whats happening" or "whats up")
Hindi - नमस्ते, namaste
Hopi - Mike (just as you would pronounce the name short for Michael)
Hungarian, Magyar - jó napot (pronounced yoh naput; daytime; formal), szervusz (pronounced sairvoose; informal), szia (pronounced seeya; informal), or even heló, like english hello but a longer "o"
Igbo - nde-ewo (pronounced enday aywo), nna-ewo (pronounced enna wo)
Indonesian - halo (hello), selamat pagi (morning), selamat siang (afternoon), selamat malam (evening)
Irish - "Dia duit" (pronounced "Deah Duit"; also means "God Be With You")
Italian - ciào (pronounced chow; informal; also means "goodbye"), buon giorno (pronounced bwohn geeornoh; good morning; formal), buon pomeriggio (pronounced bwohn pohmehreejeeoh; good afternoon; formal), buona sera (pronounced bbwoonah sehrah; good evening; formal)
Japanese - おはよう ございます ohayoou gozaimasu (pronounced o-ha-yo (go-zai-mass); good morning), 今日は konnichi wa (pronounced kong-nee-chee-wa; daytime or afternoon), 今晩は konbanwa (pronounced kong-ban-wa; evening); もし もし moshi moshi (pronounced moh-shee moh-shee; when calling/answering the phone); どうも doumo (pronounced doh-moh; informal way of thanking/greeting, but means countless other things as well so only use when context makes sense)
Kazakh - Salem (hello), Kalay zhagday (How are you?)
Klingon - nuqneH? [nook-neck] (literally: "what do you want?")
Konkani:Namaskar,Namaskaru (I bow to thee,formal)',Dev baro dis div,(may God bless you with a good day,informal)
Korean - 안녕하세요ahn nyeong ha se yo (formal; pronouned on-nyoung-ha-say-yo), 안녕ahn nyeong (informal; can also be used to mean "goodbye")(when calling/answering the phone"; 여보세요 "yeo-bo-sae-yo" (prounounced "yuh-boh-say-yoe")
Kurdish — choni, roj bahsh (day; pronounced rohzj bahsh)
Lao - sabaidee (pronounced sa-bai-dee)
Latin (Classical) - salve (pronounced sal-way; when talking to one person), salvete (pronounced sal-way-tay; when talking to more than one person), ave (pronounced ar-way; when talking to one person; when talking to someone respected), avete (pronounced ar-way-tay; when talking to more than one respected person)
Latvian - labdien, sveiki, chau (informal; pronounced chow).
Lingala - mbote
Lithuanian - laba diena (formal), labas, sveikas (informal; when speaking to a male), sveika (informal; when speaking to a female), sveiki (informal; when speaking to more than one person).
Lojban - coi
Luxembourgish - moïen (pronounced MOY-en)
Slavomacedonian - Здраво (Zdravo; meaning Hello), Добро утро (Dobro utro; meaning Good morning), Добар ден (Dobar den; meaning Good day), Добро вечер (Dobro vecher; meaning Good evening)
Malayalam - namaskkaram
Malaysian - Selamat datang, which can also mean welcome (pronounced seh-la-mat dah-tan, the g is silent) or you could say apa khabar, which can also mean how are you (pronounced a-pa ka-bar)
Maldivian (Dhivehi) - kihineth (meaning "how" - the common way of greeting)
Maori - kia ora (kia o ra) (literally "be well/healthy" and is translated as an informal "hi." This term has also been adopted by English speakers in New Zealand), tena koe, ata marie, morena (good morning)
Polish - dzień dobry (formal), witaj (hello) cześć (hi, pronounced, "cheshch")
Portuguese - oi, boas, olá or alô (informal); bom dia or bons dias (good morning, used before noon or before the noon meal); boa tarde or boas tardes (good afternoon, used after noon or after the noon meal, until twilight); boa noite or boas noites (good evening and good night, used after twilight).
Punjabi - sat sri akal
Rajasthani (Marwari)- Khamma Ghani sa, Ram Ram sa
Romanian - salut, buna dimineata (formal; morning) buna ziua (formal; daytime) buna searaformal; evening), buna (usually when speaking to a female pronounced boo-nhuh)
Russian - Privet!pronounced as pree-vyet (informal), zdravstvuyte (formal; pronounced ZDRA-stvooy-tyeh)
Scottish, howzitgaun (informal, means "Hello, how are you?") hello (formal)
Senegal - salamaleikum
Serbian - zdravo, ćao (informal), dobro jutro (morning, pronounced dobro yutro), dobar dan (afternoon), dobro veče (pronounced dobro vetcheah evening), laku noć (night), do viđenja (see you soon)
Sinhala - a`yubowan (pronounced au-bo-wan; meaning "long live")kohomada? (ko-ho-ma-da meaning how are you?)
Slovak - dobrý deň (formal), ahoj (pronounced ahoy), čau (pronounced chow) and dobrý (informal abbreviation)
Slovenian — živjo (informal; pronounced zhivyo), dobro jutro (morning), dober dan (afternoon), dober večer (evening; pronounced doh-bear vetch-air)
South African English - hoezit (pronounced howzit; informal)
Spanish - hola (pronounced with a silent 'h': o-la), alo, qué onda (South America;very informal, like "what's up"; pronounced keh ondah), qué hay, (South America; very informal), qué pasa (Spain, informal), buenos días ("good morning"), buenas tardes (afternoon and early evening), buenas noches (late evening and night). These three forms can be made informal by saying "buenas". Also Qué Transa (Mexico;very informal, like "what's up" pronounced keh trahansa). Qué tál, meaning "what's up", pronounced "kay tal".
Sulka - marot (morning; pronounced mah-rote [rolled r and lengthened o], mavlemas (afternoon; v is pronounced as a fricative b), masegin (evening; g is pronounced as a fricative)
Swahili - jambo? or "hujambo?," which loosely translate as 'how are you?' are commonly used but you may also say Habari gani? (What is the news?)
Swedish - tja (very informal; pronounced sha), hej (informal; pronounced hey), god dag (formal)
Swiss German - hallo (informal), grüezi (formal, pronounced kind of grew-tsi), grüessech (formal, used in the Canton of Berne, pronounced grewe-thech)
Tagalog (Pilipino - Philippines) - Kumusta po kayo? (formal, means "How are you, sir or madam", pronounced "kuh-muh-stah poh kah-yoh"), Kumusta ka? (informal, means "how are you?", "kuh-muh-stah kah"). You can also add na when talking to someone you haven't see in a while, Kumusta na po kayo? or Kumusta ka na?. Magandang umaga po (Good morning, pronounced "mah-gan-dang oo-mah-gah poh"), Magandang hapon po (Good afternoon, "mah-gan-dang ha-pon poh"), Magandang gabi po (Good evening or night, "mah-gan-dang gah-beh poh"), Magandang tanghali po (good day, literally midday or noon, "mah-gan-dang tang-ha-leh poh"); NOTE: to make these informal greetings, drop po from the end and add the person's first name. Still, some people use words like mare or pare (very informal greeting, mare pronounced "mah-reh" for a close female friend; pare pronounced "pah-reh" for a close male friend). You may add it either before or after the greeting. Example, Mare, kumusta ka na? or Kumusta ka na, pare?
Tahitian - ia orana
Taiwanese (Hokkien) - Li-ho
Tamil - vanakkam
Telugu- namaskaram, baagunnara (means "how are you?"; formal)