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ERROR_INSTALL_LANGUAGE_UNSUPPORTED
ERROR_INSTALL_LANGUAGE_UNSUPPORTED means that Windows Installer could not select a supported language for the package or transform. It is a package-language compatibility problem, not a general display-language error.
What to check for ERROR_INSTALL_LANGUAGE_UNSUPPORTED
- Verify the language and transform resources distributed with the exact package version.
- Check the target system locale and the language requirements documented by the product vendor.
- For package authors, test language transforms and fallback behavior on supported target configurations.
for it, Microsoft: Windows Installer error codes · Microsoft: initialization errors
Where the result is returned
This result is Win32 system error 1623 (0x00000657) from winerror.h. AllStat describes it as “The language of this installation package is not supported by your system.”. The code is useful only together with the API that failed, because multiple Windows components can reuse system-error values while imposing different retry and cleanup rules.
Diagnostic sequence
- Call GetLastError immediately after the failing API and save this result, the function name, all relevant flags, and the target path, handle, service, device, account, or policy object.
- Capture the component log that owns the install / language operation and retain the original numeric value before a framework converts it to an HRESULT or exception.
- compare preconditions with the API documentation and reproduce with a minimal request before changing system-wide configuration.
Retry this result only after the resource or state named in “The language of this installation package is not supported by your system.” has changed. For invalid parameters, unsupported formats, missing objects, policy restrictions, and access failures, correct the input or configuration instead of immediately repeating the same call.
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