Their library was actually made for dasher.. http://www.inference.org.uk/dasher/ - there was a web version being made (https://github.com/dasher-project/dasher-web We hit a bottleneck with the graphics driving. Note in dasher pretty much the entire tree is in dynamic view). Now this may help to understand the use case. Dasher is for people with disabilities who cant speak. It needs to be a personalised LM that trains on the fly and and keeps track of new words/sentences. But in truth too, utterances are usually small.

Don't get too knocked back by comments. A) If it works - it works. B) Your learning is as valuable as the outcome.

Oh have a look at https://imagineville.org/software/ for some other things that may be of interest..