Overwrite the modified email confirmation message from PMPro Email Confirmation Add On.

pmproec_overwrite_message.php

<?php

// Copy from below here...

/*
 *	Overwrite the modified email confirmation message from PMPro Email Confirmation Add On.
 */
function my_pmproec_pmpro_confirmation_message( $message ) {
	remove_filter( 'pmpro_confirmation_message', 'pmproec_pmpro_confirmation_message' );
	//must be an email confirmation level
	if(!empty($_REQUEST['level']) && pmproec_isEmailConfirmationLevel(intval($_REQUEST['level'])))
	{
		global $current_user;
		if($current_user->pmpro_email_confirmation_key != "validated")
		{
			$message = str_replace( "is now active", esc_html__( "will be activated as soon as you confirm your email address", "pmpro-email-confirmation" ) . ". <strong>" . sprintf( esc_html__( "Important! You must click on the confirmation URL sent to %s before you gain full access to your membership", "pmpro-email-confirmation" ), $current_user->user_email ) . "</strong>", $message );
		}
	}
	
	return $message;
}
add_filter( "pmpro_confirmation_message", "my_pmproec_pmpro_confirmation_message", 9  );

/*
 *	Overwrite the message for users without access from PMPro Email Confirmation Add On.
 */
function my_pmproec_pmpro_text_filter($text){
	remove_filter("pmpro_non_member_text_filter", "pmproec_pmpro_text_filter");
	remove_filter("pmpro_not_logged_in_text_filter", "pmproec_pmpro_text_filter");
	global $wpdb, $current_user, $post;

	if(!empty($post) && !empty($current_user->ID)) {
		
		//does this user have a level that requires confirmation?
		$user_membership_level = pmpro_getMembershipLevelForUser($current_user->ID);
		if(!empty($user_membership_level) && pmproec_isEmailConfirmationLevel($user_membership_level->id)) {
			$validated = $current_user->pmpro_email_confirmation_key;

			//need validation?
			if( ! empty($validated) && $validated != "validated" ) {
				$text = '<p>' . sprintf( esc_html__('Your %s membership will be activated as soon as you confirm your email address', 'pmpro-email-confirmation'), $user_membership_level->name) . '.<strong> ' . sprintf( esc_html__('Important! You must click on the confirmation URL sent to %s before you gain full access to your membership', 'pmpro-email-confirmation'), $current_user->user_email) . '</strong>.</p>';
			}
		}
	}	

	return $text;
}
add_filter("pmpro_non_member_text_filter", "my_pmproec_pmpro_text_filter", 9);
add_filter("pmpro_not_logged_in_text_filter", "my_pmproec_pmpro_text_filter", 9);