Hi!
A fast-way to make the plugin compatible with WPML is adding a wpml-config.xml file in the plugin root directory containing:
<wpml-config>
<admin-texts>
<key name="CookieLawInfo-0.9">
<key name="notify_message" />
<key name="button_1_text" />
<key name="button_1_url" />
<key name="button_2_text" />
<key name="button_2_url" />
<key name="showagain_text" />
</key>
</admin-texts>
</wpml-config>
That just tell what arrays that this plugin store in the database should be translated, after that you can just edit those arrays via “WPML String Translation” plugin ??