If you use the command
chcp
in your windows command terminal it should give you the used code page of it.
850 is "
Multilingual Latin 1; Western European" and should support
romance language group chars, which i guess is yours part of. You could try and set your WIN cmd with the command
chcp 65001
to utf-8 and see if its works then.
No. Renpy has in the
encoding dir a good number of them.
These
english letters are commonly called latin alphabet.

The english use them just 1:1...
Other european nations have some additions or changes. The only other alphabets in (part) europe are greek and cyrillic and not in code page ibm850 or windows1252 included.