Cory Nemelka wrote: > ERROR: 22023: could not create locale "fr_FR.utf8": No such file or > directory > DETAIL: The operating system could not find any locale data for the locale > name "fr_FR.utf8". > LOCATION: report_newlocale_failure, pg_locale.c:1312 I can reproduce this by creating a new locale *after* starting PostgreSQL and trying to use it before a restart. Example with Ubuntu 18.04 and Postgres 11.5: # locale-gen es_ES.utf8 Generating locales (this might take a while)... es_ES.UTF-8... done Generation complete. Immediately refering to the locale will fail: $ sudo -u postgres psql -d test -U postgres test=# create collation es (provider=libc, locale='es_ES.utf8'); ERROR: could not create locale "es_ES.utf8": No such file or directory DÉTAIL : The operating system could not find any locale data for the locale name "es_ES.utf8". Now restart postgresql $ sudo /etc/init.d/postgresql restart [ ok ] Restarting postgresql (via systemctl): postgresql.service. And now it works: $ sudo -u postgres psql -d test -U postgres test=# create collation es (provider=libc, locale='es_ES.utf8'); CREATE COLLATION test=# select * from pg_collation where collname='es' \gx -[ RECORD 1 ]-+----------- collname | es collnamespace | 2200 collowner | 10 collprovider | c collencoding | 6 collcollate | es_ES.utf8 collctype | es_ES.utf8 collversion | Best regards, -- Daniel Vérité PostgreSQL-powered mailer: http://www.manitou-mail.org Twitter: @DanielVerite