rename language_po setting entry to language

frontend/ui/language.lua

@@ -6,20 +6,20 @@ local _ = require("gettext")
 
 Language = {}
 
-function Language:changeLanguage(lang_po)
+function Language:changeLanguage(lang_locale)
-	_.changeLang(lang_po)
+	_.changeLang(lang_locale)
-	G_reader_settings:saveSetting("language_po", lang_po)
+	G_reader_settings:saveSetting("language", lang_locale)
 	UIManager:show(InfoMessage:new{
 		text = _("Please restart reader for new language setting to take effect."),
 		timeout = 3,
 	})
 end
 
-function Language:genLanguageSubItem(lang, lang_po)
+function Language:genLanguageSubItem(lang, lang_locale)
 	return {
 		text = lang,
 		callback = function()
-			self:changeLanguage(lang_po)
+			self:changeLanguage(lang_locale)
 		end
 	}
 end

reader.lua

@@ -11,9 +11,9 @@ local _ = require("gettext")
 -- has to be done before requiring other files because
 -- they might call gettext on load
 G_reader_settings = DocSettings:open(".reader")
-local lang_po = G_reader_settings:readSetting("language_po")
+local lang_locale = G_reader_settings:readSetting("language")
-if lang_po then
+if lang_locale then
-	_.changeLang(lang_po)
+	_.changeLang(lang_locale)
 end
 
 local UIManager = require("ui/uimanager")