Have now played through over half of a game with Australia, and I have to say, I find it hard to decide what I like most about them (apart from them being clearly my favorite civ to play). Their production bonus on being declared war is just amazing, with how fast you can push out units, walls or maybe that district in the low production city that's going to give so much of yield X. I also
really, as in,
extremely very much, like the Outback Station. It's basically a farm with an extra production, and disadvantages compared to normal farms are offset when you have pastures too, and cattle and sheep aren't exactly the rarest resources. And then you get Steam Power and
every single Outback Station is like a mine on flat land at once, beaten only by the pastures that basically give 5+ production each. And of course having bonus yields from all "global yield" districts (science, culture, faith, gold) isn't a bad thing either... Most certainly not if there's a mountain range, well, basically in the middle of your empire, while the edge of your empire is coastal.
Wait, what game file? Proof please.
Steam/steamapps/common/Sid Meier's Civilization VI/Base/Platforms/Windows/English(US)/Speech_Localized.txt
Search on, for example, "England" in the file. First hit gives you a list with all civilizations currently in the game, plus Persia and Macedonia. The file has not been updated since sometime last year, so Australia was in it two months before it was announced
at least.
(btw, the file lists the names of all the speeches in loading screen)
Maybe I got bad RGN, however, most of the time I play as Australia, my capital spawn in flat land area, lack of production. The unique improvement (which should add hammer) came too late.
Flat land? That's awesome. Early on you don't chop any forests (nor resources). If it's plains, you might have to build a few farms if you want to keep growing, but you're probably fine just improving resources, assuming you got a rice or deer or cattle (preferably) or whatever. For the early game you just use the base production from plains or forests to have some production, if that's not enough an internal trade route might help (but I doubt it's not enough; your capital has bonus production from palace anyways, and for other cities you can pick the best unimproved tiles first). In the civic tree, you beeline Guilds (and Feudalism for the +2 builder charges) and then you spam some 3-4 builders and just build like 10 Outback Stations. Guilds isn't exactly
late, as it's an early medieval civic. Also, when you have Outback Stations unlocked, you
do chop every single forest and bonus resource that's in the way of outback stations. If they're not better now, they will be once you have Steam Power and Rapid Deployment (together +1f1p per EVERY TWO outback stations; those things can give up to 4f4p on top of normal tile yields in the endgame. That's a big food AND a big cog visually).
A visual representation of this method (don't mind the map pins btw; I was bored and decided to name everything):
