diff --git a/app/src/main/java/eu/kanade/presentation/more/stats/StatsScreenContent.kt b/app/src/main/java/eu/kanade/presentation/more/stats/StatsScreenContent.kt
index 64f59280ca..a24b4cb640 100644
--- a/app/src/main/java/eu/kanade/presentation/more/stats/StatsScreenContent.kt
+++ b/app/src/main/java/eu/kanade/presentation/more/stats/StatsScreenContent.kt
@@ -140,7 +140,7 @@ private fun TrackerStats(
     val meanScoreStr = remember(data.trackedTitleCount, data.meanScore) {
         if (data.trackedTitleCount > 0 && !data.meanScore.isNaN()) {
             // All other numbers are localized in English
-            String.format(Locale.ENGLISH, "%.2f ★", data.meanScore)
+            "%.2f ★".format(Locale.ENGLISH, data.meanScore)
         } else {
             notApplicable
         }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
index 30f11c4d15..8b54cfabd9 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
@@ -59,6 +59,7 @@ import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 import java.io.BufferedOutputStream
 import java.io.File
+import java.util.Locale
 import java.util.zip.CRC32
 import java.util.zip.ZipEntry
 import java.util.zip.ZipOutputStream
@@ -422,7 +423,7 @@ class Downloader(
         }
 
         val digitCount = (download.pages?.size ?: 0).toString().length.coerceAtLeast(3)
-        val filename = String.format("%0${digitCount}d", page.number)
+        val filename = "%0${digitCount}d".format(Locale.ENGLISH, page.number)
         val tmpFile = tmpDir.findFile("$filename.tmp")
 
         // Delete temp file if it exists
@@ -537,7 +538,7 @@ class Downloader(
         if (!downloadPreferences.splitTallImages().get()) return
 
         try {
-            val filenamePrefix = String.format("%03d", page.number)
+            val filenamePrefix = "%03d".format(Locale.ENGLISH, page.number)
             val imageFile = tmpDir.listFiles()?.firstOrNull { it.name.orEmpty().startsWith(filenamePrefix) }
                 ?: error(context.stringResource(MR.strings.download_notifier_split_page_not_found, page.number))
 
@@ -579,11 +580,7 @@ class Downloader(
                 else -> true
             }
         }
-        if (downloadedImagesCount != downloadPageCount) {
-            return false
-        }
-
-        return true
+        return downloadedImagesCount == downloadPageCount
     }
 
     /**
diff --git a/core/src/main/java/tachiyomi/core/util/system/ImageUtil.kt b/core/src/main/java/tachiyomi/core/util/system/ImageUtil.kt
index 0aa7f9f59c..68da52505b 100644
--- a/core/src/main/java/tachiyomi/core/util/system/ImageUtil.kt
+++ b/core/src/main/java/tachiyomi/core/util/system/ImageUtil.kt
@@ -31,6 +31,7 @@ import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
 import java.io.InputStream
 import java.net.URLConnection
+import java.util.Locale
 import kotlin.math.abs
 import kotlin.math.max
 import kotlin.math.min
@@ -274,6 +275,7 @@ object ImageUtil {
     }
 
     private fun splitImageName(filenamePrefix: String, index: Int) = "${filenamePrefix}__${"%03d".format(
+        Locale.ENGLISH,
         index + 1,
     )}.jpg"