.

Add this to your active theme's functions.php file and adjust text need locations in code snippet below.

/* Change Text Site Wide */

function wpfi_change_text( $translated_text ) {
  if ( $translated_text == 'ORIGINAL TEXT' ) {
    $translated_text = 'NEW TEXT';
  }
  return $translated_text;
}
add_filter( 'gettext', 'wpfi_change_text', 20 );