[gpm]

"Frenchman" (one word) is always... "old and inconsiderate" is a good description. "French man" (two words) is at times still appropriate.

[troad]

No, Frenchman is fine. It's a neutral and common descriptor, and I've far more often heard it said by French people than about them. Similar to Spaniard.

Not everything needs to be perennially problematised.