The crossword solution for the term 'On Language Columnist' is William Safire. William Safire was an American author, journalist, and presidential speechwriter. He was a long-time syndicated political columnist for The New York Times and wrote the On Language column in the Sunday Magazine of The New York Times. He was also a regular panelist on the PBS show 'Inside Washington'. Safire was known for his conservative political views and his witty writing style.