Hi! We're Amisi and Claude, builders of the i2 language and the i2forge platform. i2 is an (early draft of a) language designed to make formal verification easy for mathematicians.
We are launching the language as an open source project today (https://i2lang.org) together with a closed alpha for i2forge.
However, we have a publicly accessible demo page which anyone can use, and we would love your feedback.