Add Australian dictionary to Indesign
Please add Australian Dictionary to Indesign. It was once doable but complicated to add the Hunspell dictionary to Indesign with earlier versions but now is impossible as the files that need changes are locked. I'm sure you have thousands of Australian users paying about $900 per year. This is a fix that I would have thought would only take five minutes to do

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Paul George commented
As a long time user of InDesign, (v1) this has been a constant frustration for me.
While we can't stop US English being introduced by stealth (code, html, etc.), there is, as Colin Flashman indicated in his well reasoned and well written article, Australian English and UK English are not exactly the same.
This probably isn't hard to fix Adobe.. Demonstrate a little support for a country of early adopters that are paying about $900 per year to use your apps.