Dux is used in other contexts, eg in Portugal for leaders of universities 'fraternities'. No fascist implications whatsoever.

Some people are eager to raise their pitchforks, but we don't need to police every word.

There are several other mentions of this in other threads. Its entirely possible it is an oversight. Yet I would also not be entirely surprised if (at least for some people) it is a well-chosen subtle troll, given that there are people that would find such a thing funny in this space (= recent heavily LLM-driven wayland ricing, aka hyprland, omarchy, also neovim, etc).