Spelling checker should ignore letter case

Дмитрий Федоренко 9 aastat tagasi uuendatud 9 aastat tagasi 0
Spelling checker does not work for words with uppercase letters for Cyrillic. For example the word "Объект" is emphasized as an "объект" does not.
I used the dictionary extracted from this and convert to utf-8.

I am sorry English. I used google translate.