Added the -c <CHARSET> option to the "source" command.  Default value is UTF-8.  User can pass in platform-default to use the platform's default file encoding

source -c platform-default <file>

Jonathan, please update the wiki page for the "source" command to add the -c option.  Also, the -tx option is missing from the wiki page.

NAME
       source - execute commands or SQL statements from a file

SYNOPSIS
       source [OPTION...] FILE [ARGUMENT...]
       source [OPTION...]

DESCRIPTION
       Read and execute commands or SQL statements from FILE in the current shell environment.

       If FILE is not supplied, source reads input from standard input.

OPTIONS
       -c, --charset CHARSET
              The character set to be used for encoding; supported values are: 'UTF-8' and 'platform-default', default to 'UTF-8'.
       -e BOOLEAN
              Echo FluidShell commands, default to 'true'.
       -sc BOOLEAN
              Stop on any exception occurred in a FluidShell command, default to 'false'.
       -ss BOOLEAN
              Stop on any exception occurred in an SQL statement, default to 'true'.
       -tx {COMMIT | ROLLBACK | NONE}
              Determine whether to commit or rollback all data changes, or do nothing, on an SQL exception when -ss is set to true and autocommit is turned off; default to 'NONE'.
       
       See BOOLEAN VALUES section below for supported BOOLEAN values.

BOOLEAN VALUES
       The followings are supported BOOLEAN values: 'true', 'false', 'yes', 'no', 'y', 'n', 'on', 'off', '1', '0'.

SEE ALSO
       go

One way to verify this fix is to pass in the JVM parameter -Dfile.encoding=<encoding> to use a different code page for file encoding and you can confirm the setting in Help > Support Information > Operating Environment.

For example, set -Dfile.encoding=Cp1252 and when using the -c platform-default option with the source command, umlaut characters should be handled correctly.