How to make paser written for English work?

Question

Python

I tried to parry the game with Nscripter on Rren'py, I found a ready-made code on github
, it works, so
it replaces all Nscrirpt commands with renpy ones , only it was written with the expectation of English and when you try to feed it a code with Russian text, it starts to swear at everything

D:\ren'py games\nscripter2renpy-master\src>python parsar.py 0.txt > script2.rpy
Traceback (most recent call last):
  File "parsar.py", line 905, in <module>
    parser.tokenize(input.read())
  File "parsar.py", line 59, in tokenize
    self.tokens = [token for token in lex.scan(content) if token is not None and token.type != "COMMENT"]
  File "parsar.py", line 59, in <listcomp>
    self.tokens = [token for token in lex.scan(content) if token is not None and token.type != "COMMENT"]
  File "D:\ren'py games\nscripter2renpy-master\src\lexer.py", line 49, in __next__
    return self.scan_next()
  File "D:\ren'py games\nscripter2renpy-master\src\lexer.py", line 74, in scan_next
    raise UnknownTokenError(self.input[self._position], self.lineno)
lexer.UnknownTokenError: Line #9866, Found token:

he swears at spaces, I suppose
if you try to change to
input = open(sys.argv[1], 'r', encoding = 'utf-8')

input = open(sys.argv[1], 'r', encoding='windows-1251')

then he starts to vomit

D:\ren'py games\nscripter2renpy-master\src>python parsar.py 0.txt > script2.rpy
Traceback (most recent call last):
  File "parsar.py", line 905, in <module>
    parser.tokenize(input.read())
  File "C:\Users\gama\AppData\Local\Programs\Python\Python38\lib\encodings\cp1251.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x98 in position 248964: character maps to <undefined>

if you translate Cyrillic into Latin with him, then he starts swearing at the letter ''I'' 0x98 dots followed by a hyphen and everything else how can I make it work with Russian text? Thank
you in advance for your reply