Can I use this "Before a comment appears" validation method along with the others?
Integration with other validation methods is not developed yet. Next release? :)
How can I change the mail texts?
Actually there are 2 options:
- Edit or create the xx_XX.po file for your WP active language and generate a xx_XX.mo.
- Also you can use WPML plugin to translate all your plugins like themes. But remember to delete the languages folder. :)