Please change the title to something like "DiffLens: Language Aware Diffs on GitHub Pull Requests". It's fine to post your stuff here, but it's better that it's clear that it's a post and not a question.
About the project: It was difficult to understand what it is doing looking at the 3 screenshots in the page. After a few hops I reached the demo https://www.difflensapp.com/difflensDemo2_849ca26f9ee09faa08... that is easier to understand.