I copied the blog to a different server (development). A full backup of all directories plus a backup of all tables + the usual run of replacing the site address in tables.
Everything works as expected, a copy of the site retained all functionality and posts except that Polylang did not retain its configuration. It looks like if it is freshly installed. Trying to figure out where its config comes from I could not find any tables in DB. Where is it config and why was it lost?
Thanks in advance!