SQL Server Express - silent installation ends on unsupported language

Question

I'm using command SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS to install SQL Server 2019 Express. The installation ends with:

Your language čeština (Česko) (cs-CZ) is not supported. Continue in English?

See this for more information: https://learn.microsoft.com/sql/sql-server/install/local-language-versions-in-sql-server

For more information use /? or /Help.

I found parameter /ENU

Use this parameter to install the English version of SQL Server on a localized operating system when the installation media includes language packs for both English and the language corresponding to the operating system.

No matter what combination I choose the installation will end the same. I've tried so far:

SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=true
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=True
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=false
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=False

SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU="true"
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU="True"
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU="false"
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU="False"

SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=0
SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=1

What am I missing? How to proceed english installation without end-user interaction?

Answer 1

Thanks to AlwyasLearning I figured a solution:

1. execute SQL2019-SSEI-Expr.exe /Action=Download /MediaType=Core , SQLEXPR_x64_ENU.exe will be downloaded
2. run SQLEXPR_x64_ENU.exe manunaly, just to extract to subfolder SQLEXPR_x64_ENU
3. from the subfolder SQLEXPR_x64_ENU execute SETUP.EXE /q /IACCEPTSQLSERVERLICENSETERMS /ENU /Action=Install

Answer 2

To add to pburgr's answer, because StackOverflow won't let me comment (great), at step 2, for unattended installations, run:

SQLEXPR_x64_ENU.exe /q /x:SQLEXPR_x64_ENU