Rado Petrik <r(dot)p(at)szm(dot)sk> writes:
> export LANG=cs_CZ
> Failed to initialize lc_messages to ''
> FATAL: invalid value for option 'LC_MESSAGES': 'cs_CZ'
Evidently your platform doesn't have complete support for setting locale
to cs_CZ. Try it again with a combination like
export LANG=cs_CZ
export LC_MESSAGES=C
regards, tom lane