nnno actually I don’t. I believe शुभ कामनाएँ (Shubh Kaamnaayein) is “good luck” in Hindi. I kept finding people who said that सौभाग्य (pronounced something like soubhaagya) was “good luck” in Sanskrit (with भाग्य being just “luck”). However, an anon said that

The Sanskrit phrase शुभ कामनाएँ really means something like blessings and ‘I wish you well’ etc. It’s usually said when greeting someone for a festival and things like that.  So it could sort of mean good luck.

(see this ask)