diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionFilterController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionFilterController.kt
index 8a5b3abf8..c33984b1a 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionFilterController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionFilterController.kt
@@ -2,28 +2,27 @@ package eu.kanade.tachiyomi.ui.browse.extension
 
 import androidx.preference.PreferenceScreen
 import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.data.preference.minusAssign
+import eu.kanade.tachiyomi.data.preference.plusAssign
 import eu.kanade.tachiyomi.extension.ExtensionManager
 import eu.kanade.tachiyomi.ui.setting.SettingsController
 import eu.kanade.tachiyomi.util.preference.onChange
 import eu.kanade.tachiyomi.util.preference.switchPreference
 import eu.kanade.tachiyomi.util.preference.titleRes
 import eu.kanade.tachiyomi.util.system.LocaleHelper
-import uy.kohesive.injekt.Injekt
-import uy.kohesive.injekt.api.get
+import uy.kohesive.injekt.injectLazy
 
 class ExtensionFilterController : SettingsController() {
 
+    private val extensionManager: ExtensionManager by injectLazy()
+
     override fun setupPreferenceScreen(screen: PreferenceScreen) = screen.apply {
         titleRes = R.string.label_extensions
 
         val activeLangs = preferences.enabledLanguages().get()
 
-        val availableLangs =
-            Injekt.get<ExtensionManager>().availableExtensions.groupBy {
-                it.lang
-            }.keys
-                .minus("all")
-                .sortedWith(compareBy({ it !in activeLangs }, { LocaleHelper.getSourceDisplayName(it, context) }))
+        val availableLangs = extensionManager.availableExtensions.groupBy { it.lang }.keys
+            .sortedWith(compareBy({ it !in activeLangs }, { LocaleHelper.getSourceDisplayName(it, context) }))
 
         availableLangs.forEach {
             switchPreference {
@@ -33,16 +32,11 @@ class ExtensionFilterController : SettingsController() {
                 isChecked = it in activeLangs
 
                 onChange { newValue ->
-                    val checked = newValue as Boolean
-                    val currentActiveLangs = preferences.enabledLanguages().get()
-
-                    preferences.enabledLanguages().set(
-                        if (checked) {
-                            currentActiveLangs + it
-                        } else {
-                            currentActiveLangs - it
-                        }
-                    )
+                    if (newValue as Boolean) {
+                        preferences.enabledLanguages() += it
+                    } else {
+                        preferences.enabledLanguages() -= it
+                    }
                     true
                 }
             }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionPresenter.kt
index b9ac17b73..4c174ea6b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionPresenter.kt
@@ -69,7 +69,7 @@ open class ExtensionPresenter(
             .filter { avail ->
                 installed.none { it.pkgName == avail.pkgName } &&
                     untrusted.none { it.pkgName == avail.pkgName } &&
-                    (avail.lang in activeLangs || avail.lang == "all") &&
+                    avail.lang in activeLangs &&
                     (showNsfwSources || !avail.isNsfw)
             }
             .sortedBy { it.name }