As Rory points out, there are many locations in Australia named by the French and still known by those names. Apparently changing them didn't seem to be an issue. I was brought up in Tasmania, the south of which still bears many marks of the voyage of Bruny d'Entrecasteaux - and Battery Point, which (with its companions on the other side of the bay) defended the channel approaches to Hobart against French invasion. Among the names of interest are Salamanca Place (on the docks), Bruny Island, d'Entrecasteaux Channel, Recherche Bay, Hippolyte Rocks, Cape Peron, Cape Lodi, Cape Boullanger etc etc. Here in Victoria there is a Mt Arapiles (just the one, I think) (pronounced a-RA-pil-es).
I think there was a thread on this topic a while ago?
Not altogether on topic, but there were at least 2 French emigrés teaching art in Australia in the 1880s who wereexiled for their part in the Paris Commune, another interesting phase in French history - Lucien Henri in Sydney and Lucien Dechaineux in Hobart, bothe very influential in their circles.