There are several promotional codes available for Lingopie. One of them offers $100 off. Another code provides up to 5% off. There's also an unverified code that could give an extra 70% off. Other codes offer 20%, 15%, and 10% off. A 70% discount is also available on a lifetime subscription. Please note that these codes might be subject to terms and conditions set by Lingopie. It's recommended to check the validity of these codes on the respective websites.