Translates the PMPro Not Logged In text while using Polylang.

pmpro_polylang_translate_notloggedintext.php

<?php

// Copy from below here...

/*
 * Translates the PMPro Not Logged In text while using Polylang.
 * Currently set up to use US English and Spain Spanish.
 */
function my_pmpro_polylang_translate_notloggedintext( $value, $options ) {
	switch ( get_locale() ) {
		case 'en_US':
			$value = 'Not logged in.';
			break;
		case 'es_ES':
			$value = 'Sin iniciar sesión.';
			break;
	}
	return $value;
}
add_filter( 'option_pmpro_notloggedintext', 'my_pmpro_polylang_translate_notloggedintext', 10, 2 );