L10N Issue

init.php, line 905

The code can be the following:
<input name="ipbl_settings_but" id="ipbl_settings_but" class="button button-primary" value="<?php esc_html_e( 'Save', 'ip-based-login' ); ?>" type="submit" />
Then the button label “Save” can be localizable.

functions.php, line 70
The code can be the following:
$error['no_ipv6_support'] = sprintf( __('IPv6 is not supported in Free version. %1$sUpgrade to Pro%2$s', 'ip-based-login'), '<a href="'.IPBL_PRICING_URL.'" target="_blank">', '</a>');
Then the sentence “IPv6 is not supported in Free version. Upgrade to Pro” can be fully localizable.