The other morning I was listening to WBBM-AM radio (www.wbbm780.com), in Chicago. The radio station has been playing "Holiday Greetings" from various persons in their management. But one in particular caught my attention.
The manager of whatever came on with "Happy Holidays and Season's Greetings. The management of WBBM wish all our listeners a Feliz Navidad and Propero Ano Nuevo, Happy Holidays and Season's Greetings to all." The (English) word "Christmas" was never mentioned.
Apparently saying Merry Christmas is only unacceptable if you say it in English. Saying it in Spanish is perfectly acceptable.
Posted by John Ray (M.A.; Ph.D.).