🌐 feat(i18n): overhaul translation system & add languages (#145)

Revamp the existing translation system, simplifying
management and adding several new languages. The new system reads from
TOML files in the `/i18n` directory and improves template structures.
It also enhances customisation options and robustness by providing
fallbacks and modularity.

- Implement a new, streamlined translation macro.
- Load translations from `/i18n` TOML files.
- Remove redundant configuration requirements.
- Refactor templates to align with new i18n system.
- Add support for Hindi, Japanese, Russian, Portuguese, Chinese,
  Italian, German, Ukranian, Korean, and French languages.
- Credit Thomas Weitzel (@thomasweitzel) for inspiration.

config.toml

@@ -6,29 +6,26 @@ generate_feed = true
 compile_sass = true
 minify_html = true
 
+# To translate the entire theme, there must be a file with the same ISO 639-1 Code
+# in the `i18n` folder of your site or the tabi theme (e.g. "i18n/fr.toml" for French).
+# Otherwise the theme will be in English.
+# See https://welpo.github.io/tabi/blog/faq-languages/ for more details.
 default_language = "en"
 
-taxonomies = [
-    {name = "tags", feed = true},
-]
+taxonomies = [{name = "tags", feed = true}]
 
 [markdown]
 external_links_target_blank = true
 highlight_code = true
 highlight_theme = "css"
 
-default_language = "en"
-
 [languages.es]
 title = "~/tabi"
 description = "tabi es un tema de Zola rápido, liviano y moderno con JavaScript opcional y una puntuación perfecta en Lighthouse."
 generate_feed = true
 compile_sass = true
 minify_html = true
-
-taxonomies = [
-    {name = "tags", feed = true},
-]
+taxonomies = [{name = "tags", feed = true}]
 
 [languages.ca]
 title = "~/tabi"
@@ -36,112 +33,9 @@ description = "tabi és un tema de Zola ràpid, lleuger i modern amb JavaScript
 generate_feed = true
 compile_sass = true
 minify_html = true
-
-taxonomies = [
-    {name = "tags", feed = true},
-]
-
-[languages.es.translations]
-language_name = "Español"
-date_locale = "es_ES"
-# Menu items.
-blog = "blog"
-archive = "archivo"
-tags = "etiquetas"
-words = "palabras"
-projects = "proyectos"
-# Other text.
-tags_title = "Todas las etiquetas"
-404_error = "La página que has solicitado parece no existir o aún no se ha traducido a tu idioma. Revisa la URL en busca de errores o"
-go_home = "regresa a la página de inicio"
-read_more = "Leer más"
-all_posts = "Todas las entradas"
-all_tags = "Todas las etiquetas"
-min_read = "min de lectura"
-powered_by = "Impulsado por"
-and = "y"
-post = "entrada"
-posts = "entradas"
-prev = "Anterior"
-next = "Siguiente"
-of = "de"
-draft = "BORRADOR"
-table_of_contents = "Tabla de contenido"
-last_updated_on = "Última actualización el"
-show_original_quote = "Mostrar cita original"
-show_translation = "Mostrar traducción"
-load_comments = "Cargar comentarios"
-see_changes = "Ver cambios"
-site_source = "Código del sitio"
-# Quotation marks for multilingual quote shortcode.
-open_quotation_mark = "«"
-close_quotation_mark = "»"
-# Translations for stylised Atom feed.
-this_is_a_web_feed = "Esta es una fuente web"
-also_known_as_an_Atom_feed = "también conocida como fuente Atom"
-subscribe = "Suscríbete"
-by_copying_the_URL_from_the_address_bar_into_your_newsreader = "copiando la URL de la barra de direcciones en tu lector de noticias"
-visit = "Visita"
-to_learn_more_and_get_started = "para aprender más y empezar"
-it_s_free = "Es gratis"
-website = "la web"
-recent_posts = "Publicaciones recientes"
-
-[languages.ca.translations]
-language_name = "Català"
-date_locale = "ca_ES"
-# Menu items.
-blog = "blog"
-archive = "arxiu"
-tags = "etiquetes"
-words = "paraules"
-projects = "projectes"
-# Other text.
-tags_title = "Totes les etiquetes"
-404_error = "La pàgina que has sol·licitat sembla que no existeix o encara no s'ha traduït al teu idioma. Comprova l'URL per detectar errors o"
-go_home = "torna a la pàgina d'inici"
-read_more = "Llegir més"
-all_posts = "Totes les entrades"
-all_tags = "Totes les etiquetes"
-min_read = "min de lectura"
-powered_by = "Propulsat per"
-and = "i"
-post = "entrada"
-posts = "entrades"
-prev = "Anterior"
-next = "Següent"
-of = "de"
-draft = "ESBORRANY"
-table_of_contents = "Taula de contingut"
-last_updated_on = "Última actualizació el"
-show_original_quote = "Mostra la cita original"
-show_translation = "Mostra la traducció"
-load_comments = "Carregar comentaris"
-see_changes = "Veure canvis"
-site_source = "Codi del lloc"
-# Quotation marks for multilingual quote shortcode.
-open_quotation_mark = "«"
-close_quotation_mark = "»"
-# Translations for stylised Atom feed.
-this_is_a_web_feed = "Aquest és un canal web"
-also_known_as_an_Atom_feed = "també conegut com a canal Atom"
-subscribe = "Subscriu-te"
-by_copying_the_URL_from_the_address_bar_into_your_newsreader = "copiant l'URL de la barra d'adreces al teu lector de notícies"
-visit = "Visita"
-to_learn_more_and_get_started = "per aprendre més i començar"
-it_s_free = "És gratuït"
-website = "la web"
-recent_posts = "Publicacions recents"
+taxonomies = [{name = "tags", feed = true}]
 
 [extra]
-
-# Languages for your site.
-# Each should have a translation section above.
-# e.g. [languages.ca.translations]
-language_name.ca = "Català"
-language_name.en = "English"
-language_name.es = "Español"
-
 # Enable JavaScript theme toggler to allow users to switch between dark/light mode.
 # Also enables automatic switching based on user's OS-level theme settings.
 # If disabled, your site will only use the theme specified in the `default_theme` variable.