labels not catched by makepot

Better WordPress reCAPTCHA v. 1.1.0
Contact Form 7 reCAPTCHA extension v. 0.1.0
Contact Form 7 v. 3.7
Wordpress v. 3.7.1

The current bwp-recaptcha-fr_FR.po provided with the plugin is for v. 1.0.2: some labels are not included in it.
As the bwp-recaptcha.pot provided is for v. 1.1.0, I tried to update with it the bwp-recaptcha-fr_FR.po. But then the plugin header labels were removed!
It seems there were directly added in the .po file.

So the next step was to generate a new .pot file with wordpress-i18_tools’ makepot.
But now two labels are missing :
– includes/class-bwp-recaptcha-cf7.php, ligne 110 : “Please refer to […]”
– includes/class-bwp-framework.php, ligne 211 : “Donate to “

Each time, it’s a concatenate label: makepot is unable to catch such label.

To keep makedot happy, we need something like:

– includes/class-bwp-recaptcha-cf7.php, ligne 110 :

<?php $cust_doc_url = __('http://betterwp.net/wordpress-plugins/bwp-recaptcha/#customization', self::$_domain);
					printf(__('Please refer to <a target="_blank" href="%s">BWP reCAPTCHA\'s documentation </a> for a quick guide on how to customize the look and feel of this tag.', self::$_domain), $cust_doc_url); ?>

– includes/class-bwp-framework.php, ligne 211:

<input type="hidden" name="item_name" value="<?php printf(__('Donate to %s', $this->plugin_dkey),  $this->plugin_title); ?>" />

https://wordpress.org/plugins/bwp-recaptcha/