Correctly set language after intitle paragraphs

Fixes: #11514

diff --git a/src/output_latex.cpp b/src/output_latex.cpp
index 0866317702bad726045252fdc71b7947f41fc8e5..4124d2dd1c92fde9f5cf08cb62ca29808ed1277f 100644 (file)
--- a/src/output_latex.cpp
+++ b/src/output_latex.cpp
@@ -848,13 +848,30 @@ void TeXOnePar(Buffer const & buf,
                        && (priorpar->getDepth() > par.getDepth()
                            || (priorpar->getDepth() == par.getDepth()
                                && priorpar->layout() != par.layout()));
+
+       // We need to ignore previous intitle commands since languages
+       // are switched locally there (# 11514)
+       // There might be paragraphs before the title, so we check this.
+       Paragraph * prior_nontitle_par = nullptr;
+       if (!intitle_command) {
+               pit_type ppit = pit;
+               while (ppit > 0) {
+                       --ppit;
+                       Paragraph const * tmppar = &paragraphs.at(ppit);
+                       if (tmppar->layout().intitle && tmppar->layout().isCommand())
+                               continue;
+                       prior_nontitle_par = const_cast<Paragraph*>(tmppar);
+                       break;
+               }
+       }
        Language const * const prev_language =
-               runparams_in.for_search ?
-                       languages.getLanguage("ignore")
-               :(priorpar && !priorpar->isPassThru())
-                       ? (use_prev_env_language ? state->prev_env_language_
-                                               : priorpar->getParLanguage(bparams))
-                       : outer_language;
+               runparams_in.for_search 
+                       ? languages.getLanguage("ignore")
+                       : (prior_nontitle_par && !prior_nontitle_par->isPassThru())
+                               ? (use_prev_env_language 
+                                       ? state->prev_env_language_
+                                       : prior_nontitle_par->getParLanguage(bparams))
+                               : outer_language;
 
        bool const use_polyglossia = runparams.use_polyglossia;
        string const par_lang = use_polyglossia ?
@@ -979,7 +996,7 @@ void TeXOnePar(Buffer const & buf,
                        if ((runparams.encoding->package() != Encoding::CJK
                                 || bparams.useNonTeXFonts
                                 || runparams.for_search)
-                           && (par_lang != openLanguageName(state) || localswitch)
+                           && (par_lang != openLanguageName(state) || localswitch || intitle_command)
                            && !par_lang.empty()) {
                                string bc = use_polyglossia ?
                                          getPolyglossiaBegin(lang_begin_command, par_lang,