✨ feat(i18n): display lcode in language switcher (#565)

config.toml

@@ -200,6 +200,8 @@ fediverse_creator = { handle = "zloy_linux", domain = "zlinux.ru" }
 show_previous_next_article_links = true
 invert_previous_next_article_links = true
 
+# For multilingual sites: show current language code on the language switcher.
+show_selected_language_code_in_language_switcher = false
 
 # Enable iine like buttons on all posts: https://iine.to/
 # Can be set at page or section levels, following the hierarchy: page > section > config. See: https://welpo.github.io/tabi/blog/mastering-tabi-settings/#settings-hierarchy