add Command line param "language"

engine/cl_main.cpp

@@ -2742,9 +2742,16 @@ void CL_InitLanguageCvar()
 		cl_language.SetValue( Steam3Client().SteamApps()->GetCurrentGameLanguage() );
 	}
 	else
+	{
+		if ( CommandLine()->CheckParm( "-language" ) )
+		{
+			cl_language.SetValue( CommandLine()->ParmValue( "-language", "english") );
+		}
+		else
 		{
 			cl_language.SetValue( "english" );
 		}
+	}
 }
 
 void CL_ChangeCloudSettingsCvar( IConVar *var, const char *pOldValue, float flOldValue );