I think you can consider the relationship between English teaching and teaching software first. Many years ago, I used a software to learn spoken English, which was still the third generation. It's called speaking English at will. It has a function to record the user's follow-up, and then compare the audio of the user's voice with the standard audio and score it. You can see the ripple of your own voice and the image of standard ripple. I think this is a good application of information technology. After so many years, I wonder if there is any new progress in this technology.
There are also some online oral English teaching, which will use information technology to compare and transmit the audio of students' pronunciation.
Another kind of software is to speed up or slow down audio, which is also the information technology used in English teaching. How to reduce the distortion of audio by speeding up the playback of slow listening materials is a problem.
I have heard of a reading speed-up software that displays sentences at a certain speed, just like subtitles, and users can adjust the speed. Details can be found in the online help.
English teaching is nothing more than combining listening (audio), watching (image) and reading (text) of English materials, coordinating with each other and creating more efficient learning methods. I hope what I said is enlightening to the landlord.