Add additional asciify documentation
This was proposed in but never dealt with, so after going through some confusion around this myself I figured it's about time.
@@ -165,6 +165,10 @@ take place before applying the :ref:`replace` configuration and are roughly
equivalent to wrapping all your path templates in the ``%asciify{}``
:ref:`template function <template-functions>`.
+This uses the `unidecode module`_ which is language agnostic, so some
+characters may be transliterated from a different language than expected.
+For example, Japanese kanji will usually use their Chinese readings.
+
Default: ``no``.
.. _unidecode module: https://pypi.org/project/Unidecode
