title: SQL Server Express - silent installation ends on unsupported language
body: <p>I'm using command <code>SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS</code>
  to install SQL Server 2019 Express.
  The installation ends with:</p>
  <pre><code>Your language čeština (Česko) (cs-CZ) is not supported. Continue in English?
  
  See this for more information: https://docs.microsoft.com/sql/sql-server/install/local-language-versions-in-sql-server
  
  For more information use /? or /Help.
  </code></pre>
  <p>I found parameter <code>/ENU</code></p>
  <p><em>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.</em></p>
  <p>No matter what combination I choose the installation will end the same.
  I've tried so far:</p>
  <pre><code>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=&quot;true&quot;
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=&quot;True&quot;
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=&quot;false&quot;
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=&quot;False&quot;
  
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=0
  SQL2019-SSEI-Expr.exe /q /IACCEPTSQLSERVERLICENSETERMS /ENU=1
  </code></pre>
  <p>What am I missing? How to proceed english installation without end-user interaction?</p>