Consolodate locale related resources in language scope

Dockerfile

@@ -54,7 +54,7 @@ COPY ./ /src
 WORKDIR /src
 
 # Take note of SILE's supported locales so the final system can build localized messages
-RUN ls i18n/ | sed 's/[.-].*$/_/;s/^/^/' | sort -u | grep -Ef - /usr/share/i18n/SUPPORTED > /etc/locale.gen
+RUN ls -d languages/*/ | sed -e 's!/$!_!;s!.*/!^!' | sort -u | grep -Ef - /usr/share/i18n/SUPPORTED > /etc/locale.gen
 
 # GitHub Actions builder stopped providing git history :(
 # See feature request at https://github.com/actions/runner/issues/767

build-aux/list-distfiles.sh.in

@@ -19,7 +19,7 @@ am_list () {
 printf '%s =' SILEDATA
 finder core -name '*.lua' -not -name '*_spec.lua' -not -name 'version.lua' -not -name 'features.lua' -not -name 'pathsetup.lua'
 finder classes inputters languages outputters packages shapers types typesetters pagebuilders -name '*.lua' -not -name '*_spec.lua'
-finder classes i18n packages -name '*.ftl'
+finder classes languages packages -name '*.ftl'
 finder packages -name '*.svg'
 
 printf '\n\n%s =' LUALIBRARIES

core/languages.lua

@@ -31,7 +31,7 @@ SILE.languageSupport = {
             )
          )
       end
-      local ftlresource = string.format("i18n.%s", language)
+      local ftlresource = string.format("languages.%s.messages", language)
       SU.debug("fluent", "Loading FTL resource", ftlresource, "into locale", language)
       -- This needs to be set so that we load localizations into the right bundle,
       -- but this breaks the sync enabled by the hook in the document.language

languages/README.md

@@ -6,6 +6,10 @@ Supporting a language in SILE involves some combination of:
 * A hyphenation patterns module
 * Localization strings
 
+## Localization strings
+
+Each locale may have a `messages.ftl` file that provides translations of strings that may be output into documents.
+
 ## Hyphenation patterns
 
 Hyphenation rules are typically handled via patterns for the Knuth-Liang hyphenation algorithm.

languages/tr/messages.ftl

@@ -0,0 +1,15 @@
+bibliography-and = ve
+
+bibliography-edited-by = { $name } tarafından düzenlendi
+
+bibliography-et-al = ve ark.
+
+bibliography-translated-by = { $name } tarafından tercüme edildi
+
+book-chapter-title = Bölüm { $number }
+
+hello = Merhaba <em>{ $name }</em>!
+
+tableofcontents-not-generated = İçindekiler tablosunu işlemek için SİLE'yi yeniden çalıştırın!
+
+tableofcontents-title = İçindekiler

i18n/und.ftl → languages/und/messages.ftl

@@ -1,3 +1,5 @@
+bibliography-et-al = <language main="la">et al</language>.
+
 hello = Namárië <em>{ $name }</em>!
 
 tableofcontents-not-generated = <language main="en">Rerun SILE to process the table of contents!</language>