Show locale name in system default locale

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionDetailsController.kt

@@ -73,7 +73,7 @@ class ExtensionDetailsController(bundle: Bundle? = null) :
 
         binding.extensionTitle.text = extension.name
         binding.extensionVersion.text = context.getString(R.string.ext_version_info, extension.versionName)
-        binding.extensionLang.text = context.getString(R.string.ext_language_info, LocaleHelper.getDisplayName(extension.lang, context))
+        binding.extensionLang.text = context.getString(R.string.ext_language_info, LocaleHelper.getSourceDisplayName(extension.lang, context))
         binding.extensionPkg.text = extension.pkgName
         extension.getApplicationIcon(context)?.let { binding.extensionIcon.setImageDrawable(it) }
         binding.extensionUninstallButton.clicks()

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionFilterController.kt

@@ -31,7 +31,7 @@ class ExtensionFilterController : SettingsController() {
         availableLangs.forEach {
             switchPreference {
                 preferenceScreen.addPreference(this)
-                title = LocaleHelper.getDisplayName(it, context)
+                title = LocaleHelper.getSourceDisplayName(it, context)
                 isPersistent = false
                 isChecked = it in activeLangs
 

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionHolder.kt

@@ -42,7 +42,7 @@ class ExtensionHolder(view: View, override val adapter: ExtensionAdapter) :
         ext_title.text = extension.name
         version.text = extension.versionName
         lang.text = if (extension !is Extension.Untrusted) {
-            LocaleHelper.getDisplayName(extension.lang, itemView.context)
+            LocaleHelper.getSourceDisplayName(extension.lang, itemView.context)
         } else {
             itemView.context.getString(R.string.ext_untrusted).toUpperCase()
         }

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionPresenter.kt

@@ -90,7 +90,7 @@ open class ExtensionPresenter(
         }
         if (availableSorted.isNotEmpty()) {
             val availableGroupedByLang = availableSorted
-                    .groupBy { LocaleHelper.getDisplayName(it.lang, context) }
+                    .groupBy { LocaleHelper.getSourceDisplayName(it.lang, context) }
                     .toSortedMap()
 
             availableGroupedByLang

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralController.kt

@@ -62,15 +62,14 @@ class SettingsGeneralController : SettingsController() {
                 titleRes = R.string.pref_language
 
                 val langs = mutableListOf<Pair<String, String>>()
-                langs += Pair("", context.getString(R.string.system_default))
+                langs += Pair("", "${context.getString(R.string.system_default)} (${LocaleHelper.getDisplayName("")})")
                 langs += arrayOf(
                     "ar", "bg", "bn", "ca", "cs", "de", "el", "en-US", "en-GB", "es", "fr", "he",
                     "hi", "hu", "in", "it", "ja", "ko", "lv", "ms", "nb-rNO", "nl", "pl", "pt",
                     "pt-BR", "ro", "ru", "sc", "sr", "sv", "th", "tl", "tr", "uk", "vi", "zh-rCN"
                 )
                     .map {
-                        val locale = LocaleHelper.getLocaleFromString(it)
-                        Pair(it, locale!!.getDisplayName(locale).capitalize())
+                        Pair(it, LocaleHelper.getDisplayName(it))
                     }
                     .sortedBy { it.second }
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsSourcesController.kt

@@ -40,7 +40,7 @@ class SettingsSourcesController : SettingsController() {
             // Create a preference group and set initial state and change listener
             switchPreferenceCategory {
                 preferenceScreen.addPreference(this)
-                title = LocaleHelper.getDisplayName(lang, context)
+                title = LocaleHelper.getSourceDisplayName(lang, context)
                 isPersistent = false
                 if (lang in activeLangsCodes) {
                     setChecked(true)

app/src/main/java/eu/kanade/tachiyomi/ui/source/LangHolder.kt

@@ -10,6 +10,6 @@ class LangHolder(view: View, adapter: FlexibleAdapter<*>) :
         BaseFlexibleViewHolder(view, adapter) {
 
     fun bind(item: LangItem) {
-        title.text = LocaleHelper.getDisplayName(item.code, itemView.context)
+        title.text = LocaleHelper.getSourceDisplayName(item.code, itemView.context)
     }
 }

app/src/main/java/eu/kanade/tachiyomi/util/system/LocaleHelper.kt

@@ -47,12 +47,24 @@ object LocaleHelper {
     /**
      * Returns Display name of a string language code
      */
-    fun getDisplayName(lang: String?, context: Context): String {
+    fun getSourceDisplayName(lang: String?, context: Context): String {
         return when (lang) {
-            null -> ""
             "" -> context.getString(R.string.other_source)
             SourcePresenter.PINNED_KEY -> context.getString(R.string.pinned_sources)
             "all" -> context.getString(R.string.all_lang)
+            else -> getDisplayName(lang)
+        }
+    }
+
+    /**
+     * Returns Display name of a string language code
+     */
+    fun getDisplayName(lang: String?): String {
+        return when (lang) {
+            null -> ""
+            "" -> {
+                systemLocale!!.getDisplayName(systemLocale).capitalize()
+            }
             else -> {
                 val locale = getLocale(lang)
                 locale.getDisplayName(locale).capitalize()