  Language technologies play a key role in assisting people with their writing.
Although there has been steady progress in e.g., grammatical error correction
(GEC), human writers are yet to benefit from this progress due to the high
development cost of integrating with writing software. We propose TEASPN, a
protocol and an open-source framework for achieving integrated writing
assistance environments. The protocol standardizes the way writing software
communicates with servers that implement such technologies, allowing developers
and researchers to integrate the latest developments in natural language
processing (NLP) with low cost. As a result, users can enjoy the integrated
experience in their favorite writing software. The results from experiments
with human participants show that users use a wide range of technologies and
rate their writing experience favorably, allowing them to write more fluent
text.
