A text file created under Windows and using accents shows bad accents under OSX, e.g. amitiÈ instead or amitié or opËre instead of opère.
This is due to the encoding, which is Latin1 under Windows, and UTF8 under OSX.
Fortunately, OSX has a built in conversion tool to fix this:
Launch Terminal > iconv -f latin1 -t utf8 BD_anais.txt > BD_anais2.txt