In the early 1960s we had a picture book that was probably published in the 1950s. It was about a man and boy walking through the woods, possibly in Canada. The man was likely a lumberjack.
At the climactic moment, they encounter a moose on the trail. The man scares it away by yelling “Marche donc!”
This is all I remember about the book.
The Big Fish, by Barbara Greenough Johnson. You can borrow it from Open Library.