Use of plural strings

Which I've just learned this is a nightmare for translators

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreService.kt

@@ -380,7 +380,7 @@ class BackupRestoreService : Service() {
             .toString(), errors.size.toString()))
         val sourceMissingCount = sourcesMissing.distinct().size
         if (sourceMissingCount > 0)
-            content.add(getString(R.string.sources_missing, sourceMissingCount))
+            content.add(resources.getQuantityString(R.plurals.sources_missing, sourceMissingCount))
         if (lincensedManga > 0)
             content.add(getString(R.string.x_licensed_manga, lincensedManga))
         val trackingErrors = trackingErrors.distinct()

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -533,7 +533,8 @@ class LibraryUpdateService(
                 setContentTitle(getString(R.string.notification_new_chapters))
                 color = ContextCompat.getColor(applicationContext, R.color.colorAccentLight)
                 if (updates.size > 1) {
-                    setContentText(getString(R.string.notification_new_chapters_text, updates.size))
+                    setContentText(resources.getQuantityText(R.plurals.notification_new_chapters_text,
+                        updates.size))
                     setStyle(NotificationCompat.BigTextStyle().bigText(updates.joinToString("\n") {
                         it.first.title.chop(45)
                     }))

app/src/main/java/eu/kanade/tachiyomi/extension/ExtensionUpdateJob.kt

@@ -33,8 +33,8 @@ class ExtensionUpdateJob : Job() {
                         notify(Notifications.ID_UPDATES_TO_EXTS,
                             context.notification(Notifications.CHANNEL_UPDATES_TO_EXTS) {
                                 setContentTitle(
-                                    context.getString(
+                                    context.resources.getQuantityText(
-                                        R.string.update_check_notification_ext_updates, names.size
+                                        R.plurals.update_check_notification_ext_updates, names.size
                                     )
                                 )
                                 val extNames = if (names.size > 5) {

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

@@ -96,7 +96,7 @@ class SettingsAdvancedController : SettingsController() {
                 }, {
                     activity?.toast(R.string.cache_delete_error)
                 }, {
-                    activity?.toast(resources?.getString(R.string.cache_deleted, deletedFiles))
+                    activity?.toast(resources?.getQuantityString(R.plurals.cache_deleted, deletedFiles))
                     findPreference(CLEAR_CACHE_KEY)?.summary =
                             resources?.getString(R.string.used_cache, chapterCache.readableSize)
                 })

app/src/main/res/values/strings.xml

@@ -322,14 +322,20 @@
     <string name="restoring_backup">Restoring backup</string>
     <string name="backup_restoring_progress">Restoring (%1$d/%2$d)</string>
     <string name="creating_backup">Creating backup</string>
-    <string name="sources_missing">Sources missing: %1$d</string>
+    <plurals name="sources_missing">
+        <item quantity="one">%d source missing</item>
+        <item quantity="other">%d sources missing</item>
+    </plurals>
     <string name="x_licensed_manga">%1$d manga are now licensed and could not be restored</string>
     <string name="not_logged_into">Not logged into %1$s</string>
 
       <!-- Advanced section -->
     <string name="pref_clear_chapter_cache">Clear chapter cache</string>
     <string name="used_cache">Used: %1$s</string>
-    <string name="cache_deleted">Cache cleared. %1$d files have been deleted</string>
+    <plurals name="cache_deleted">
+        <item quantity="one">Cache cleared. %d file has been deleted</item>
+        <item quantity="other">Cache cleared. %d files have been deleted</item>
+    </plurals>
     <string name="cache_delete_error">An error occurred while clearing cache</string>
     <string name="pref_clear_cookies">Clear cookies</string>
     <string name="cookies_cleared">Cookies cleared</string>
@@ -538,8 +544,11 @@
     <!-- Library update service notifications -->
     <string name="notification_update_progress">Update progress: %1$d/%2$d</string>
     <string name="notification_new_chapters">New chapters found</string>
-    <string name="notification_new_chapters_text">For %1$d titles</string>
+    <plurals name="notification_new_chapters_text">
-    <string name="notification_and_n_more">and %1$d more.</string>
+        <item quantity="one">For %d titles</item>
+        <item quantity="other">For %d titles</item>
+    </plurals>
+    <string name="notification_and_n_more">and %1$d more chapters.</string>
     <string name="notification_cover_update_failed">Failed to update cover</string>
     <string name="notification_first_add_to_library">Please add the manga to your library before doing this</string>
     <string name="notification_not_connected_to_ac_title">Sync canceled</string>
@@ -568,7 +577,10 @@
     <string name="update_check_notification_download_complete">Download complete</string>
     <string name="update_check_notification_download_error">Download error</string>
     <string name="update_check_notification_update_available">Update available</string>
-    <string name="update_check_notification_ext_updates">%1$d extension updates available</string>
+    <plurals name="update_check_notification_ext_updates">
+        <item quantity="one">%d extension update available</item>
+        <item quantity="other">%d extension updates available</item>
+    </plurals>
 
     <!--Content Description-->
     <string name="description_backdrop">Backdrop image of manga</string>

build.gradle

@@ -2,6 +2,8 @@
 apply plugin: 'com.github.ben-manes.versions'
 
 buildscript { 
+    ext.kotlin_version = '1.3.61'
+
     repositories {
         google()
         jcenter()
@@ -13,7 +15,7 @@ buildscript {
         classpath 'com.google.gms:google-services:4.3.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
-    }
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" }
 }
 
 allprojects {