Local (flywheel) wordpress install with CiviCRM
I've posted a possible solution to the language part of the problem at https://lab.civicrm.org/dev/translation/issues/40#note_33313. It works for me on drupal 7 and should work for wordpress too I think. Add this to install/index.php around line 141:

if (!defined('CIVICRM_L10N_BASEDIR') &amp;&amp; file_exists($crmPath . DIRECTORY_SEPARATOR . 'l10n')) {
  define('CIVICRM_L10N_BASEDIR', $crmPath . DIRECTORY_SEPARATOR . 'l10n');
}


The other part of the problem is already fixed in the latest 5.23.