I've made Japanese(Kanji Hiragana)-English dictionary a little better. Now it can find katakana words if you print them on built-in hiragana keyboard.
For small extended katakana chars just print their big version in hiragana:
アァ=あ
イィ=い
ウゥ=う
エェ=え
オォ=お
ワヮ=わ
Morphem search is also a little better now.
Here you can download the dictionary:
https://disk.yandex.ru/d/npQww3WHzM7Jfg