Mandarin: Gong Xi Fa Cai/Xin Nian Kuai Le
Cantonese: Kung Hei Fat Choi
Hokkien (Fujian/Taiwanese): Kiong Hee Huat Tsai/Sin Ni khòai lok
Simplified Chinese: 恭喜发财 新年快乐
Traditional Chinese: 恭喜發財 新年快樂
Updated from Happy Year of the Snake! and Happy Year of the Dragon! as well as the original Happy Lunar New Year! on LiveJournal.