Currently the deinflection engine performs the deinflection on a romaji string, which will basically convert へんあい to henai and will deinflect it to heru. This is not easy to fix...
Yet, I have tried to search for exact term of へんあい. While it will find the "heru" words, it will not find へない. I have created a separated issue for this: #677
In 3.39.20, doing an exact search for へんあい also searches for へない, even though the user entered kana rather than romaji.
The text was updated successfully, but these errors were encountered: