The output and result are good:

& правопесание 5 0: правописание, правописанием, правописанию, правописании, правописания

--------------------------------

Additional footprints:

change try_one_edit_word: new_word=aравопесание < the first letter is english, other are russian, this word can not be correct spelled and it should not be analising
change try_one_edit_word: new_word=bравопесание
change try_one_edit_word: new_word=cравопесание
change try_one_edit_word: new_word=dравопесание
change try_one_edit_word: new_word=eравопесание
change try_one_edit_word: new_word=fравопесание
change try_one_edit_word: new_word=gравопесание
change try_one_edit_word: new_word=hравопесание
...
change try_one_edit_word: new_word=пращопесание < only russian - may be correct spelled
change try_one_edit_word: new_word=прачопесание
change try_one_edit_word: new_word=праъопесание
change try_one_edit_word: new_word=правaпесание
change try_one_edit_word: new_word=правbпесание
change try_one_edit_word: new_word=правcпесание
change try_one_edit_word: new_word=правdпесание
change try_one_edit_word: new_word=правeпесание
...
add one letter in try_one_edit_word: new_word=прdавопесание < english and russian letters
add one letter in try_one_edit_word: new_word=прeавопесание
add one letter in try_one_edit_word: new_word=прfавопесание
add one letter in try_one_edit_word: new_word=прgавопесание
add one letter in try_one_edit_word: new_word=прhавопесание
add one letter in try_one_edit_word: new_word=прiавопесание
add one letter in try_one_edit_word: new_word=прjавопесание
add one letter in try_one_edit_word: new_word=прkавопесание