+# fontspec errors with `slides` class:
+# LaTeX error: "kernel/command-already-defined"
+# Lines 2684 ... 2690 in fontspec-xetex.sty
+# Lines 2608 ... 2614 in fontspec-luatex.sty
+export/templates/slides_.*_systemF
+
+# Beamer: conflicts with some combinations of packages/settings/languages
+export/templates/ja_beamer-conference-ornate-20min_(pdf2|pdf[45]).*
+export/templates/es_beamer-conference-ornate-20min_pdf4_texF
+
+# Arabic
+#
+# Larger Arabic documents currently have non-tex-fonts and XeTeX as default
+# output. To fix pdfTeX export:
+# - set all non-Arab text parts to a different language (e.g. English)
+# - define alternatives for hyperref (e.g. with textorpdfstring)
+# for correct handling of hyperref.
+# - solve problem with ToC:
+# ! This can't happen (copying).
+# \AtBegShi@Output ...ipout \box \AtBeginShipoutBox
+# \fi \fi
+# l.62 \tableofcontents
+# {}
+# I'm broken. Please show this to someone who can fix can fix
+#
+# see discussion at https://www.mail-archive.com/search?l=mid&q=20161114035123.s5lt4ib4x4obtptp%40steph
+#
+# Babel-Arabic loads "inputenc" which fails with Xe/LuaTeX:
+export/.*/ar/.*_texF
+# Polyglossia problem with LuaTeX (see also Hebrew and Farsi):
+# Undefined control sequences "\luatexpardir" and "\luatextextdir".
+export/.*/ar/.*(dvi3|pdf5)_systemF
+
+# Farsi
+# Polyglossia problem with LuaTeX (undefined command) (cf. Arabic)
+# https://github.com/reutenauer/polyglossia/commit/ccb0e9e2c6411170ad779b05ff5076f1193cc323
+export/examples/fa/splash_(dvi3|pdf5)_systemF
+# Missing characters (em space and "English" quotes) with XeTeX + system fonts.
+export/examples/fa/splash_pdf4_systemF
+# missing ASCII replacements (required by XeTeX + TeX fonts)
+export/examples/fa/splash_pdf4_texF
+# "invalid utf-8 sequence" with Babel-Farsi, LuaTeX, and TeX fonts.
+export/examples/fa/splash_(dvi3|pdf5)_texF
+
+# Hebrew
+# does not currently work with LuaTeX
+export/.*/he/.*(dvi3|pdf5)_systemF
+# ... nor with XeTeX and 8-bit TeX fonts (missing ASCII replacements)
+export/.*/he/.*pdf4_texF
+
+
+# CJKutf8 does not work with XeTeX and LuaTeX (and 8-bit fonts)
+export/examples/ja/multilingual_.*_texF
+export/export/latex/CJK/zh_CN-toc_.*_texF
+
+