There is no such thing as "Hebrew Orthodox". There is only Hebrew.
In Hebrew, you usually do not mention the name of the holiday in greetings. So you would just say Happy Holiday, which is hahg same'akh (חג שמח)
Some communities do say Hanukkah Same'akh (חנוּכה שמח) meaning "Happy Hanukkah".
Happy Hanukkah = Hau'oli Hanuka
khah-noo-KAH
You shouldn't. Hanukkah and Christmas are no necessarily on the same day, so it would be inappropriate to wish someone a happy Hanukkah on December 25, if that day isn't during of Hanukkah. A better idea would be to look on a calendar to see when Hanukkah falls, then then wish your Jewish friends a Happy Hanukkah on Hanukkah.
Menorat-Chanukkah (traditional), or Hanukkiah (modern).
Hanukkah is a holiday, not a language. You cannot say "Merry Christmas in Hanukkah. That's like asking: "How do you say Merry Christmas in Easter" I think he means how do you say merry Christmas in Hebrew
"Tanoshii Hanukkah." It's a literal phrase and is likely to be gramatically incorrect.
Hanukkah is a holiday. Not a language. During Hanukkah you would say "hello" the same as on a regular day. You can also greet people by saying "Happy Hanukkah".
You say "Happy Holidays". If the person is Christian you can say "Merry Christmas", if the person is Jewish you can say "Happy Hanukkah" or if the person is African you can say "Happy Kwanzaa"
Днем Хануки Dnem Hanuki
Not very common thing to say, but it's "hyvää hanukkaa".
'Felice ChanukkÃ?' is an Italian equivalent of 'Happy Hanukkah'. 'ChanukkÃ?' also is known as 'Festa delle Luci' in Italian. That means 'Festival of the Lights' in English.
A) There is no such language as "Jewish". B) Many Jews speak Hebrew. C) Jews do not celebrate Christmas. D) It would be extremely rude to wish a Jewish person a merry Christmas, in any language.