How safe is it to make payments on LanguaTalk?

All payments made on are processed by Stripe, one of the world's most secure payment companies.

Stripe has been audited by a PCI-certified auditor and is certified to PCI Service Provider Level 1. This is the most stringent level of certification available in the payments industry. To accomplish this, they use best-in-class security tools and practices to maintain a high level of security. You can find more detailed information on this via their website.