English (Australia) - Language Packages 10.0.17763.1

[Neo Beum]

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/10d62fbf-66a1-4ca2-88d3-eb3190800...

Microsoft.LanguageExperiencePacken-GB_17763.4.6.0_neutral__8wekyb3d8bbwe.Appx

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/5d0dd47f-2061-40fd-bcd7-3185bccb5...

Language Pack (en-GB Basic Features) - 5d0dd47f-2061-40fd-bcd7-3185bccb558e

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/3cf3011e-f24b-45a1-a54e-529de0615...

OCR (en-GB) - 3cf3011e-f24b-45a1-a54e-529de0615a5f

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/9d2029b8-2ef5-47e2-94f6-869ccde19...

Handwriting (en-GB) - 9d2029b8-2ef5-47e2-94f6-869ccde191f0

*Note: en-GB Handwriting package also contains en-IN

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/3e8d99eb-56ec-4ae2-bfdd-bc984051f...

Speech (en-AU) - 3e8d99eb-56ec-4ae2-bfdd-bc984051f9a6

http://tlu.dl.delivery.mp.microsoft.com/filestreamingservice/files/53e8f1b6-072f-4fcd-a7a6-1cf83bdf4...

TextToSpeech (en-AU) - 53e8f1b6-072f-4fcd-a7a6-1cf83bdf455d

Append .cab to the downloaded files, and use DISM to add packages to the Image, as well as the appx package.

If creating an Install ISO, use English-US base for the Windows Image, and not English-GB. English-Australia can use either - however using en-GB needs extra configuration to ensure the default input matches Australian Keyboards, which are standard en-US.

[#2]

@Neo Beum

Please let @Pankaj Mathur know your experience over at https://techcommunity.microsoft.com/t5/Windows-IT-Pro-Blog/Adding-Local-Experience-Packs-to-your-Win...

Microsoft hasn't really improved things with 1809 regarding multi-language images in an enterprise setting. Things that worked nicely before are broken now, and the intended replacement is, well,  pretty beta. 

[#3]

@b_homburg 

Appreciate the feedback - but if you read his blog - you would see that I did complain already back in 22-10-2018 11:05 PM

Nothing has been done because it's probably too hard for them