Comprehensive language test document and some more fixes.

Work around or document language clashes and limitations.

development/autotests/invertedTests

@@ -72,6 +72,17 @@ export/templates/Articles/International_Union_of_Crystallography.*_pdf4_systemF
 export/templates/Articles/R_Journal_(dvi3|pdf[45])_systemF
 #export/templates/Articles/Kluwer_.*_systemF
 
+# Babel and fontenc not fails for some supported languages
+# * check BabelPremble definitions in lib/languages
+# * fails also due to #11522, see "lyxbugs" below.
+export/export/latex/supported-languages_.*_systemF
+
+# dvipdfm fails (missing Hebrew font DavidCLM-Medium.pfa)
+# also many warnings 
+#  xdvipdfmx:warning: Interpreting PS code failed!!! Output might be broken!!!
+#  xdvipdfmx:warning: Interpreting special command ps: (ps:) failed.
+# maybe due to the Hebrew vocalisation using Postscript 3 specials
+export/export/latex/supported-languages_pdf3
 
 # ================================================
 Sublabel: lyxbugs
@@ -132,6 +143,8 @@ export/templates/Articles/IEEE_Transactions_Journal_lyx16
 #   Could not find LaTeX command for character 'í' (code point 0xed)
 export/doc/(de|es)/Additional_pdf4_texF
 export/export/latex/xetex-inputenc-utf8_pdf4_texF
+# no unicodesymbols replacements for Arab charaters
+export/export/latex/supported-languages_pdf4_texF
 
 #11520 "listerrors" fails with pdflatex, lualatex, and xelatex
 # Example for lib/scripts/listerrors
@@ -279,6 +292,8 @@ export/.*/ar/.*_texF
 # Polyglossia bug with LuaTeX and LTR languages (also Hebrew and Farsi):
 # Undefined control sequences "\luatexpardir" and "\luatextextdir".
 export/.*/ar/.*(dvi3|pdf5)_systemF
+# no Arab charaters with luainputenc
+export/export/latex/supported-languages_(dvi3|pdf5)_texF
 
 # Farsi
 # Polyglossia problem with LuaTeX (undefined command) (cf. Arabic)

lib/languages

@@ -81,7 +81,8 @@
 #   * yyyy	the year as four digit number
 # * Encoding is the default encoding used with TeX fonts.
 #   It is only used if Document > Settings > Language > Encoding
-#   is set to "Language Default" and "use non-TeX fonts" is FALSE.
+#   is set to "Language Default" or "Language Default (no inputenc)"
+#   and "use non-TeX fonts" is FALSE.
 #   Encoding "inherit" means: keep encoding of the context (used by
 #   latex_language).
 # * FontEncoding is a bar-separated list of font encodings.
@@ -231,6 +232,11 @@ Language arabic_arabi
 	FontEncoding     LAE
 	DateFormats      "d MMMM، yyyy|dd/MM/yyyy|d/M/yyyy"
 	RTL              true
+	PostBabelPreamble
+	  % arabi + hyperref redefines \noboundary as local textcommand
+	  \let\orig@noboundary\noboundary
+	  \DeclareTextCommandDefault{\noboundary}{\orig@noboundary}
+	EndPostBabelPreamble
 	LangCode         ar_SA
 End
 
@@ -335,6 +341,8 @@ Language basque
 End
 
 # not yet supported by polyglossia
+# Up to 2018-08-25 (babel-belarusian 1.4), the babel option is "belarusianb"
+# but the language name "belarusian" (without trailing "b").
 Language belarusian
 	GuiName          "Belarusian"
 	BabelName        belarusian
@@ -346,6 +354,7 @@ Language belarusian
 End
 
 # not yet supported by polyglossia
+# The (rarely used) Cyrillic script is not supported (try serbian).
 Language bosnian
 	GuiName          "Bosnian"
 	BabelName        bosnian
@@ -883,6 +892,8 @@ Language kazakh
 	FontEncoding     T2A
 	DateFormats      "dd MMMM yyyy|dd MMMM yyyy|yyyy-dd-MM"
 	LangCode         kk_KZ
+	# FIXME: this sets the global font encoding also
+	# if Kazakh is only used as secondary language.
 	PostBabelPreamble
 	\input{t2aenc.def}
 	\AtBeginDocument{\fontencoding{T2A}\selectfont}
@@ -1001,7 +1012,7 @@ Language macedonian
 	Provides         textcyrillic
 End
 
-# not yet supported by babel
+# not supported by babel
 Language malayalam
 	GuiName          "Malayalam"
 	PolyglossiaName  malayalam
@@ -1209,7 +1220,8 @@ Language serbian
 	PolyglossiaOpts  "script=Cyrillic"
 	QuoteStyle       polish
 	Encoding         utf8
-	FontEncoding     T2A
+        # Cyrillic font encoding required but not set by "serbianc".
+	# FontEncoding     T2A
 	DateFormats      "d. MMMM yyyy|d. MMM yyyy|dd.MM.yyyy"
 	LangCode         sr_RS
 End
@@ -1330,9 +1342,12 @@ Language thai
 	FontEncoding     LTH
 	DateFormats      "dd MMMM yyyy|d MMM yyyy|dd/MM/yyyy"
 	LangCode         th_TH
-	PostBabelPreamble
-	\usepackage{thswitch}
-	EndPostBabelPreamble
+	# Fixme: load font package?
+	# +1 support for font attributes in thai emphasizing etc.
+	# -1 conflict with custom font settings and other languages' fonts
+	# PostBabelPreamble
+	# \usepackage{fonts-tlwg}
+	# EndPostBabelPreamble
 End
 
 # not supported by babel