Linguistic grouping, non latin characters

[whinette]

Thanks for your answer.

I use japanese. Kanji ordering/grouping would be too much work and not that useful.
Gojūon grouping would be perfect, for both hiragana and katakana.

Variants can be grouped with their base kana or separately, whichever is easier codewise.

I am aware that it might be more than a limited number of characters...
I'd prefer a user settings as my os language is english.