Windows Server 2019 - Text-to-Speech language offline install

[waldemarb]

Hi, i want to add Text-To-Speech feature for my language in offline mode. I installed full language pack, but I still don't have Speech language installed other than English.

In Settings > Language > (My language) > Options I have Download button below Speech, but this doesn't work since server is offline.

Is it possible to download speech language for offline installation?

[#2]

@waldemarbOk, some small progress - I think I need:

1. Feature on demand ISO

2. Microsoft-Windows-LanguageFeatures-TextToSpeech-pl-pl-Package.cab file from ISO

3. A way to install this cab file

[#3]

@waldemarbCurrently I have 2 package files:

Microsoft-Windows-LanguageFeatures-Basic-pl-pl-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cab

Microsoft-Windows-LanguageFeatures-TextToSpeech-pl-pl-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cab

but I'm unable to install them by add-windowspackage or add-windowscapability:

add-windowspackage -online -packagepath "c:\sources\Microsoft-Windows-LanguageFeatures-TextToSpeech-pl-pl-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cab" -ignorecheck -loglevel "WarningsInfo"
WARNING: Failed to add package c:\sources\Microsoft-Windows-LanguageFeatures-TextToSpeech-pl-pl-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cab
WARNING: Add-WindowsPackage failed. Error code = 0x8024402c

add-windowscapability -Name Language.TextToSpeech~~~pl-PL~0.0.1.0 -online -limitaccess -source c:\sources\Microsoft-Windows-LanguageFeatures-TextToSpeech-pl-pl-Package~31bf3856ad364e35~amd64~~10.0.17763.1.cab
add-windowscapability : The source files could not be found.