I'm struggling to generate just a simple PDF with non-ascii characters using Python 3.5.2, python-pdfkit and wkhtmltox-0.12.2.
This is the easiest example I could write:
import pdfkit
html_content = u'<p>ö</p>'
pdfkit.from_string(html_content, 'out.pdf')
This is like the output document looks like: 
I found out that I just needed to add a meta tag with charset attribute to my HTML code:
import pdfkithtml_content = """
<!DOCTYPE html>
<html>
<head><meta charset="utf-8">
</head>
<body><p>€</p><p>áéíóúñö</p>
<body>
</html>
"""pdfkit.from_string(html_content, 'out.pdf')
I actually spent quite some time following wrong solutions like the one suggested here. In case someone is interested, I wrote a short story on my blog. Sorry for the SPAM :)