African/ Eritrean/ Tigrinja: Rehus-Beal-Ledeats
Albanian:Gezur Krislinjden
Arabic: Milad MajidArgentine: Feliz Navidad
Armenian: Shenoraavor Nor Dari yev Pari Gaghand
Azeri: Tezze Iliniz Yahsi Olsun
Bahasa Malaysia: Selamat Hari Natal
Basque: Zorionak eta Urte Berri On!
Bengali: Shuvo Naba Barsha
Bohemian: Vesele VanoceBosnian: (BOSANSKI) Cestit Bozic i Sretna Nova godina
Brazilian: Feliz Natal
Breton: Nedeleg laouen na bloavezh matBulgarian: Tchestita Koleda; Tchestito Rojdestvo Hristovo
Catalan: Bon Nadal i un Bon Any Nou!
Chile: Feliz Navidad
Chinese: (Cantonese) Seng Tan FivelorChinese: (Mandarin) Sheng Dan Kuai Ler
Choctaw: Yukpa, Nitak Hollo ChitoColumbia: Feliz Navidad y Próspero Año Nuevo
Cornish: Nadelik looan na looan blethen noweth
Corsian: Pace e saluteCrazanian: Rot Yikji Dol La Roo
Cree: Mitho Makosi KesikansiCroatian: Sretan Bozic
Czech: Prejeme Vam Vesele Vanoce a stastny Novy RokDanish: Glædelig Jul
Duri: Christmas-e- Shoma Mobarak
Dutch: Vrolijk Kerstfeest en een Gelukkig Nieuwjaar! or Zalig KerstfeastEnglish: Merry Christmas
Eskimo: (inupik) Jutdlime pivdluarit ukiortame pivdluaritlo!
Esperanto: Gajan Kristnaskon
Estonian: Rõõmsaid Jõulupühi
Ethiopian: (Amharic) Melkin Yelidet BeaalFaeroese: Gledhilig jol og eydnurikt nyggjar!
Farsi: Cristmas-e-shoma mobarak bashadFinnish: Hyvaa joulua
Flemish: Zalig Kerstfeest en Gelukkig nieuw jaarFrench: Joyeux NoelFrisian: Noflike Krystdagen en in protte Lok en Seine yn it Nije Jier!
Galician: Bo NadaGaelic: Nollaig chridheil agus Bliadhna mhath ùr!
German: Fröhliche WeihnachtenGreek: Kala Christouyenna!
Haiti: (Creole) Jwaye Nowel or to Jesus Edo Bri'cho o Rish D'Shato BrichtoHausa: Barka da Kirsimatikuma Barka da Sabuwar Shekara!
Hawaiian: Mele Kalikimaka
Hebrew: Mo'adim Lesimkha. Chena tova
Hindi: Shub Naya Baras (good New Year not Merry Christmas)
Hungarian: Kellemes Karacsonyi unnepeket
Icelandic: Gledileg JolIndonesian: Selamat Hari Natal
Iraqi: Idah Saidan Wa Sanah Jadidah
Irish: Nollaig Shona Dhuit, or Nodlaig mhaith chugnatIroquois: Ojenyunyat Sungwiyadeson honungradon nagwutut. Ojenyunyat osrasay.
Italian: Buone Feste Natalizie
Japanese: Shinnen omedeto. Kurisumasu OmedetoJiberish: Mithag Crithagsigathmithags
Korean: Sung Tan Chuk Ha
Lao: souksan van ChristmasLatin: Natale hilare et Annum Faustum!
Latvian: Prieci'gus Ziemsve'tkus un Laimi'gu Jauno Gadu!
Lausitzian:Wjesole hody a strowe nowe letoLettish: Priecigus Ziemassvetkus
Lithuanian: Linksmu KaleduLow Saxon: Heughliche Winachten un 'n moi Nijaar
Luxembourgish: Schèine Chreschtdaag an e gudde RutschMacedonian: Sreken Bozhik
Maltese: IL-Milied It-tajjebManx: Nollick ghennal as blein vie noa
Maori: Meri Kirihimete
Marathi: Shub Naya Varsh (good New Year not Merry Christmas)
Navajo: Merry KeshmishNorwegian: God Jul, or Gledelig Jul
Occitan: Pulit nadal e bona annado
Papiamento: Bon PascoPapua New Guinea: Bikpela hamamas blong dispela Krismas na Nupela yia i go long yu
Pennsylvania German: En frehlicher Grischtdaag un en hallich Nei Yaahr!
Peru: Feliz Navidad y un Venturoso Año Nuevo
Philippines: Maligayang Pasko!Polish: Wesolych Swiat Bozego Narodzenia or Boze Narodzenie
Portuguese:Feliz Natal
Pushto: Christmas Aao Ne-way Kaal Mo Mobarak Sha
Rapa-Nui (Easter Island): Mata-Ki-Te-Rangi. Te-Pito-O-Te-Henua
Rhetian: Bellas festas da nadal e bun onn
Romanche: (sursilvan dialect): Legreivlas fiastas da Nadal e bien niev onn!Rumanian: Sarbatori vesele or Craciun fericit
Russian: Pozdrevlyayu s prazdnikom Rozhdestva is Novim Godom
Sami: Buorrit Juovllat
Samoan: La Maunia Le Kilisimasi Ma Le Tausaga Fou
Sardinian: Bonu nadale e prosperu annu nouScots Gaelic: Nollaig chridheil huibh
Serbian: Hristos se rodi.
Singhalese: Subha nath thalak Vewa. Subha Aluth Awrudhak Vewa
Slovak: Vesele Vianoce. A stastlivy Novy Rok
Slovene: Vesele Bozicne Praznike Srecno Novo Leto or Vesel Bozic in srecno Novo leto
Spanish: Feliz Navidad
Swedish:
God Jul and (Och) Ett Gott Nytt År
Tagalog: Maligayamg Pasko. Masaganang Bagong Taon
Tamil: (Tamizh) Nathar Puthu Varuda Valthukkal (good New Year not Merry Christmas)
Trukeese: (Micronesian) Neekiriisimas annim oo iyer seefe feyiyeech!
Thai: Sawadee Pee Mai or souksan wan ChristmasTurkish: Noeliniz Ve Yeni Yiliniz Kutlu Olsun
Ukrainian: Srozhdestvom Kristovym or Z RIZDVOM HRYSTOVYMUrdu: Naya Saal Mubarak Ho (good New Year not Merry Christmas)
Vietnamese: Chuc Mung Giang SinhWelsh: Nadolig Llawen
Yoruba: E ku odun, e ku iye'dun!
* Source
here. I have make amendment on the pronunciation of Chinese & Chinese (Cantonese) here.