ctest autotest for #11773 language nesting with lyx2lyx.

* invert failing lyx2lyx tests for ko/Welcome
* add dedicated test sample
* set language for English text part in ko/Welcome.

Also

* fix a lyx2lyx language test sample
* fix clause in unreliableTests

autotests/export/lyx2lyx/11773-language-reversion-nesting-polyglossia.lyx

@@ -0,0 +1,138 @@
+#LyX 2.4 created this file. For more info see https://www.lyx.org/
+\lyxformat 592
+\begin_document
+\begin_header
+\save_transient_properties true
+\origin unavailable
+\textclass article
+\begin_preamble
+\@ifpackageloaded{fontspec}
+  {\newfontfamily\churchslavonicfont{FreeSans}}
+  {}
+  
+\end_preamble
+\use_default_options true
+\maintain_unincluded_children false
+\language churchslavonic
+\language_package default
+\inputencoding utf8
+\fontencoding auto
+\font_roman "lmodern" "default"
+\font_sans "default" "default"
+\font_typewriter "default" "default"
+\font_math "auto" "auto"
+\font_default_family default
+\use_non_tex_fonts true
+\font_sc false
+\font_roman_osf false
+\font_sans_osf false
+\font_typewriter_osf false
+\font_sf_scale 100 100
+\font_tt_scale 100 100
+\use_microtype false
+\use_dash_ligatures true
+\graphics default
+\default_output_format default
+\output_sync 0
+\bibtex_command default
+\index_command default
+\float_placement class
+\float_alignment class
+\paperfontsize default
+\spacing single
+\use_hyperref false
+\papersize default
+\use_geometry false
+\use_package amsmath 1
+\use_package amssymb 1
+\use_package cancel 1
+\use_package esint 1
+\use_package mathdots 1
+\use_package mathtools 1
+\use_package mhchem 1
+\use_package stackrel 1
+\use_package stmaryrd 1
+\use_package undertilde 1
+\cite_engine basic
+\cite_engine_type default
+\biblio_style plain
+\use_bibtopic false
+\use_indices false
+\paperorientation portrait
+\suppress_date false
+\justification true
+\use_refstyle 1
+\use_minted 0
+\use_lineno 0
+\lineno_options \index Index
+\index Index
+\shortcut idx
+\color #008000
+\end_index
+\secnumdepth 3
+\tocdepth 3
+\paragraph_separation indent
+\paragraph_indentation default
+\is_math_indent 0
+\math_numbering_side default
+\quotes_style swiss
+\dynamic_quotes 0
+\papercolumns 1
+\papersides 1
+\paperpagestyle default
+\tablestyle default
+\tracking_changes false
+\output_changes false
+\change_bars false
+\postpone_fragile_content false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
+\end_header
+
+\begin_body
+
+\begin_layout Standard
+
+\lang english
+Church Slavonicy Document mixing English and Church Slavonicy text.
+\end_layout
+
+\begin_layout Standard
+This is a Church Slavonicy paragraph.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
+English paragraph with one 
+\lang churchslavonic
+Church Slavonicy
+\lang english
+ word.
+\end_layout
+
+\begin_layout Standard
+
+\emph on
+\lang english
+English
+\emph default
+ paragraph starting with emphasis.
+\end_layout
+
+\begin_layout Itemize
+A list
+\end_layout
+
+\begin_layout Itemize
+
+\emph on
+\lang english
+English
+\emph default
+ list item starting with emphasis.
+\end_layout
+
+\end_body
+\end_document

autotests/export/lyx2lyx/revert-languages-babel.lyx

@@ -1,5 +1,5 @@
 #LyX 2.4 created this file. For more info see https://www.lyx.org/
-\lyxformat 575
+\lyxformat 592
 \begin_document
 \begin_header
 \save_transient_properties true
@@ -7,8 +7,11 @@
 \textclass article
 \begin_preamble
 \@ifpackageloaded{fontspec}{%
-  \newfontfamily\friulanfont{FreeSans}}{%
-  \AtBeginDocument{\addto\extrasfrilulan{\sffamily}}}
+  \newfontfamily\friulanfont{FreeSans}
+}{%
+  \AtBeginDocument{\addto\extrasfriulan{\sffamily}}
+  \AtBeginDocument{\addto\extrasenglish{\rmfamily}}
+}
 \end_preamble
 \use_default_options true
 \maintain_unincluded_children false
@@ -23,7 +26,9 @@
 \font_default_family default
 \use_non_tex_fonts false
 \font_sc false
-\font_osf false
+\font_roman_osf false
+\font_sans_osf false
+\font_typewriter_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
 \use_microtype false
@@ -80,6 +85,8 @@
 \tablestyle default
 \tracking_changes false
 \output_changes false
+\change_bars false
+\postpone_fragile_content false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false

development/autotests/invertedTests

@@ -157,6 +157,9 @@ export/examples/ja/Modules/Linguistics.*systemF
 export/doc/ar/UserGuide_pdf4_systemF
 export/doc/ar/UserGuide_lyx(22|23)
 
+#11773 lyx2lyx: language reversion nesting problems with polyglossia
+export/export/lyx2lyx/11773-language-reversion-nesting-polyglossia_lyx2[23]
+export/examples/ko/Welcome_lyx2[23]
 
 # ==============================================================
 Sublabel: ert

development/autotests/unreliableTests

@@ -226,4 +226,4 @@ export/export/latex/CJK/el-zh_CN_utf8-cjk.*
 # Bug 3059: document language instead of "outer language" in table cells
 # This document fails with "fontencoding=auto-legacy" 
 # and has wrong output (RTL in table cells) with all export formats.
-export/export/latex/lyxbugs-resolved/3059.*
+export/export/latex/lyxbugs/3059.*

lib/examples/ko/Welcome.lyx

@@ -1,5 +1,5 @@
 #LyX 2.4 created this file. For more info see https://www.lyx.org/
-\lyxformat 575
+\lyxformat 592
 \begin_document
 \begin_header
 \save_transient_properties true
@@ -25,7 +25,9 @@
 \font_default_family default
 \use_non_tex_fonts true
 \font_sc false
-\font_osf false
+\font_roman_osf false
+\font_sans_osf false
+\font_typewriter_osf false
 \font_sf_scale 100 100
 \font_tt_scale 100 100
 \font_cjk mj
@@ -82,6 +84,8 @@
 \tablestyle default
 \tracking_changes false
 \output_changes false
+\change_bars false
+\postpone_fragile_content false
 \html_math_output 0
 \html_css_as_file 0
 \html_be_strict false
@@ -214,7 +218,11 @@ https://www.lyx.org
  \SpecialChar LyX
 에 대한 정보를 얻고, \SpecialChar LyX
  메일링 리스트에 가입하고, \SpecialChar LyX
- 그림으로 배우기(Graphical Tour):
+ 그림으로 배우기(
+\lang english
+Graphical Tour
+\lang korean
+):
 \begin_inset Flex URL
 status collapsed