I'm looking for a table which contains ASCII characters and same looking UTF8 characters. I know it also depends on the font is they look the same, but something generic to start with is enough.
>>> # PY3 code:
>>> a='H' # ascii
>>> b='Н' # utf8
>>> a==b
False
>>> ' '.join(format(ord(x), 'b') for x in a)
'1001000'
>>> ' '.join(format(ord(x), 'b') for x in b)
'10000011101'
>>> a='P' # ascii
>>> b='Ρ' # utf8
>>> a==b
False
>>> ' '.join(format(ord(x), 'b') for x in a)
'1010000'
>>> ' '.join(format(ord(x), 'b') for x in b)
'1110100001'
This is very useful tool as it will show you all characters which look similar and you can choose if this is REALLY similar enough for you :)
https://unicode.org/cldr/utility/confusables.jsp?a=test&r=None
Some other resources:
This is called Visual Spoofing