Just tried it again with US and had the same error! 

Status Legend:

(OK):download completed.

UUP Converter v0.7.2

Note: This script does not and cannot support the integration of updates.

Use the Windows version of the converter to integrate updates.

CAB -> ESD: Microsoft-Windows-LanguageFeatures-Speech-en-us-Package- arm64

Failed to extract Microsoft-Windows-LanguageFeatures-Speech-en-us-Package-arm64.cab