I needed to launch another lxterminal in a different character encoding. So I did:

$ LANG=en_US.UTF-8 lxterminal &

Which did not work. I eventually tracked it down to I typed the command into lxterminal. The command works if I close all copies of lxterminal and start an xterm. But xterm is has really bad clipboard interaction.

From reading the source code I found the solution is

$ LANG=en_US.UTF-8 lxterminal --no-remote &

But --no-remote is not in the man page.