A research for correcting grammatical errors automatically with suggesting the reasons in Japanese and English

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I redesigned the algorithm of my system for correcting English article errors automatically I implemented before starting this project. The result is that the system runs more accurately and quickly. Also, I implemented two error correction systems. One is for personal verb forms, and another is for prepositions. I introduced the systems at a competitive workshop and released them as open source software.As for Japanese language, I made a model of Japanese honorific expressions from regional assembly minutes automatically. In assemblies in Japan, speakers usually speak using honorific expression. The model can be used for implementing a system that corrects errors of honorific expressions and suggests why an user input is erroneous.