snap版 Nextcloud「config.php」の場所 for Ubuntu 20.04

環境

OS = 20.04.2 LTS (Focal Fossa)
パッケージマネージャー = snap

config.php の場所

/var/snap/nextcloud/current/nextcloud/config/config.php

locale が ja_JP かと思いきや、違うらしい。
下記は初期ファイルに 'default_language' => 'ja' と 'default_locale' => 'ja' を追加した状態。

<?php
$CONFIG = array (
  'apps_paths' => 
  array (
    0 => 
    array (
      'path' => '/snap/nextcloud/current/htdocs/apps',
      'url' => '/apps',
      'writable' => false,
    ),
    1 => 
    array (
      'path' => '/var/snap/nextcloud/current/nextcloud/extra-apps',
      'url' => '/extra-apps',
      'writable' => true,
    ),
  ),
  'supportedDatabases' => 
  array (
    0 => 'mysql',
  ),
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'memcache.local' => '\\OC\\Memcache\\Redis',
  'redis' => 
  array (
    'host' => '/tmp/sockets/redis.sock',
    'port' => 0,
  ),
  'log_type' => 'file',
  'logfile' => '/var/snap/nextcloud/current/logs/nextcloud.log',
  'logfilemode' => 416,
  'instanceid' => 'oc3avw87ioi0',
  'passwordsalt' => 'OeOWQoc7hBxsyxzGVduGPxUZw5cwbm',
  'secret' => '9CrZZXdxc+SQkt1iVCdL3JMXZ4Q54kZ6JSzuaV5IUK+nl2Z/',
  'trusted_domains' => 
  array (
    0 => '192.168.254.12',
    1 => 'good-arrow.net',
    2 => 'gs-demo.good-arrow.net',
  ),
  'datadirectory' => '/var/snap/nextcloud/common/nextcloud/data',
  'dbtype' => 'mysql',
  'version' => '22.2.3.0',
  'overwrite.cli.url' => 'http://192.168.254.12',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost:/tmp/sockets/mysql.sock',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'nextcloud',
  'dbpassword' => '5ld2ffP_zI47B0cQ5I9olE98mld32-IvLI06Yd5UqYaSEEu3CFQCxPnhL-KBNhPW',
  'installed' => true,
  'maintenance' => false,
  'loglevel' => 2,
  'app_install_overwrite' => 
  array (
    0 => 'mindmap_app',
  ),
  'default_language' => 'ja',
  'default_locale' => 'ja',
);