diff --git a/README.md b/README.md
index 46ae54e5..4184b2bd 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ A simple Android app that checks whether your device has root access. Displays d
 - Device info display (model, marketing name, Android version)
 - Material 3 theming with dynamic colors
 - Splash screen with custom exit animation
-- Localized in English, German, and Arabic
+- Localized in English, German, Arabic, and Russian
 
 ## Requirements
 
@@ -37,3 +37,4 @@ A simple Android app that checks whether your device has root access. Displays d
 
 ## Todo
 * Magisk root check
+* In-app language picker in the settings screen
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index c8b3a5d4..ad4a52ac 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -15,7 +15,7 @@ android {
         versionCode = 44
         versionName = "v2.0vc$versionCode"
         @Suppress("UnstableApiUsage")
-        androidResources.localeFilters += listOf("en", "ar", "de")
+        androidResources.localeFilters += listOf("en", "ar", "de", "ru")
         buildConfigField("String", "TELEMETRY_DECK_APP_ID", "\"613251CD-B223-443A-9583-3A18586FAB55\"")
     }
     buildTypes {
diff --git a/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewLocales.kt b/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewLocales.kt
index 4d4a3769..f1e3fc94 100644
--- a/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewLocales.kt
+++ b/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewLocales.kt
@@ -5,4 +5,5 @@ import androidx.compose.ui.tooling.preview.Preview
 @Preview(showBackground = true, locale = "en")
 @Preview(showBackground = true, locale = "de")
 @Preview(showBackground = true, locale = "ar")
+@Preview(showBackground = true, locale = "ru")
 annotation class PreviewLocales
\ No newline at end of file
diff --git a/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewPlayStoreListing.kt b/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewPlayStoreListing.kt
index bb6d3aa9..faa74dfb 100644
--- a/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewPlayStoreListing.kt
+++ b/app/src/main/java/com/iboalali/basicrootchecker/util/PreviewPlayStoreListing.kt
@@ -6,12 +6,15 @@ import androidx.compose.ui.tooling.preview.Preview
 @Preview(name = "Phone - English", group = "Phone", showBackground = true, locale = "en", device = "spec:width=411dp,height=891dp")
 @Preview(name = "Phone - German", group = "Phone", showBackground = true, locale = "de", device = "spec:width=411dp,height=891dp")
 @Preview(name = "Phone - Arabic", group = "Phone", showBackground = true, locale = "ar", device = "spec:width=411dp,height=891dp")
+@Preview(name = "Phone - Russian", group = "Phone", showBackground = true, locale = "ru", device = "spec:width=411dp,height=891dp")
 // 7-inch Tablet
 @Preview(name = "7-inch Tablet - English", group = "7-inch Tablet", showBackground = true, locale = "en", device = "spec:width=600dp,height=960dp,dpi=240")
 @Preview(name = "7-inch Tablet - German", group = "7-inch Tablet", showBackground = true, locale = "de", device = "spec:width=600dp,height=960dp,dpi=240")
 @Preview(name = "7-inch Tablet - Arabic", group = "7-inch Tablet", showBackground = true, locale = "ar", device = "spec:width=600dp,height=960dp,dpi=240")
+@Preview(name = "7-inch Tablet - Russian", group = "7-inch Tablet", showBackground = true, locale = "ru", device = "spec:width=600dp,height=960dp,dpi=240")
 // 10-inch Tablet
 @Preview(name = "10-inch Tablet - English", group = "10-inch Tablet", showBackground = true, locale = "en", device = "spec:width=1280dp,height=800dp,dpi=240")
 @Preview(name = "10-inch Tablet - German", group = "10-inch Tablet", showBackground = true, locale = "de", device = "spec:width=1280dp,height=800dp,dpi=240")
 @Preview(name = "10-inch Tablet - Arabic", group = "10-inch Tablet", showBackground = true, locale = "ar", device = "spec:width=1280dp,height=800dp,dpi=240")
+@Preview(name = "10-inch Tablet - Russian", group = "10-inch Tablet", showBackground = true, locale = "ru", device = "spec:width=1280dp,height=800dp,dpi=240")
 annotation class PreviewPlayStoreListing
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
new file mode 100644
index 00000000..14f6b63a
--- /dev/null
+++ b/app/src/main/res/values-ru/strings.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Basic Root Checker</string>
+
+    <!-- Main Strings-->
+    <string name="textView_Disclaimer"><![CDATA[Это приложение <b>НЕ</b> предоставит root-доступ устройству.<br>Оно лишь показывает, имеется ли root-доступ на устройстве.]]></string>
+    <string name="textView_checkForRoot">Нажмите кнопку «#» в правом нижнем углу, чтобы проверить наличие root-доступа</string>
+    <string name="rootAvailable">На устройстве есть root-доступ</string>
+    <string name="rootUnknown">Не удалось определить наличие root-доступа</string>
+    <string name="rootNotAvailable">На устройстве нет root-доступа</string>
+    <string name="action_licence">Лицензии</string>
+    <string name="action_about">О приложении</string>
+    <string name="action_settings">Настройки</string>
+    <string name="action_privacy_policy">Политика конфиденциальности</string>
+
+    <!-- Settings Strings -->
+    <string name="settings_telemetry_title">Отправлять анонимные данные об использовании</string>
+    <string name="settings_telemetry_description">Помогает улучшать приложение через TelemetryDeck. Изменения вступают в силу при следующем запуске приложения.</string>
+    <string name="settings_privacy_policy_description">Открыть политику конфиденциальности в браузере</string>
+    <string name="textViewAndroidVersion">Android</string>
+    <string name="string_your_device">Ваше устройство</string>
+    <string name="string_checking_for_root">Проверка root-доступа…</string>
+
+    <!-- About Strings -->
+    <string name="about_part1">Copyright 2026 &#169; iboalali\n\n
+        Это приложение НЕ предоставляет root-доступ.\n
+        Для работы требуется root-доступ — используйте на свой страх и риск.\n
+        Приложение не собирает никаких данных и личной информации.\n\n\n
+        Связаться со мной:</string>
+    <string name="about_visit_website">Посетить мой сайт</string>
+    <string name="about_not_affiliated">Это приложение не связано с topjohnwu и libsu и не одобрено ими</string>
+
+    <!-- Style Strings -->
+    <string name="content_description_check_for_root">Проверить root-доступ</string>
+    <string name="content_description_marketing_name">Маркетинговое название</string>
+    <string name="content_description_model_name">Название модели</string>
+    <string name="content_description_android_version">Версия Android</string>
+
+    <!-- Device Info Labels -->
+    <string name="label_device_name">Название устройства</string>
+    <string name="label_model">Модель</string>
+    <string name="label_android_version">Версия Android</string>
+    <string name="toast_content_copied">Скопировано</string>
+
+    <!-- In-app updates -->
+    <string name="update_available_title">Доступно обновление</string>
+    <string name="update_available_body">Новая версия приложения готова к загрузке.</string>
+    <string name="update_action_update">Обновить</string>
+    <string name="update_downloading">Загрузка обновления…</string>
+    <string name="update_progress_megabytes">%1$s / %2$s МБ</string>
+    <string name="update_downloaded_title">Обновление загружено</string>
+    <string name="update_action_install">Установить сейчас</string>
+    <string name="update_failed">Не удалось загрузить обновление. Повторная попытка будет выполнена автоматически.</string>
+    <string name="app_updated_snackbar">Приложение обновлено</string>
+
+    <!-- Other Apps -->
+    <string name="other_apps_title">Другие приложения</string>
+    <string name="other_apps_billboard_description">Это приложение помогает выводить крупный текст на экран и автоматически подбирает максимально возможный размер шрифта без обрезания текста.\n\nПодходит для совещаний — для голосования по теме числом или словом.</string>
+    <string name="other_apps_hide_notifications_description">Выберите постоянное уведомление, которое нужно скрыть, и оно будет оставаться скрытым, пока установлено это приложение.</string>
+
+</resources>
diff --git a/app/src/main/res/xml/app_locales_config.xml b/app/src/main/res/xml/app_locales_config.xml
index d8db341e..b0acf51b 100644
--- a/app/src/main/res/xml/app_locales_config.xml
+++ b/app/src/main/res/xml/app_locales_config.xml
@@ -3,4 +3,5 @@
     <locale android:name="en"/>
     <locale android:name="de"/>
     <locale android:name="ar"/>
+    <locale android:name="ru"/>
 </locale-config>
\ No newline at end of file
diff --git a/docs/russian-translation-notes.md b/docs/russian-translation-notes.md
new file mode 100644
index 00000000..232d7332
--- /dev/null
+++ b/docs/russian-translation-notes.md
@@ -0,0 +1,30 @@
+# Russian Translation Notes
+
+Reference notes documenting the choices made when adding the Russian (`ru`) localization in `app/src/main/res/values-ru/strings.xml`. Useful for future reviewers and for keeping subsequent string additions consistent.
+
+## Translation choices worth flagging for review
+
+- **Term: "root-доступ"** (Latin "root" + Cyrillic suffix) is used throughout. This is the standard Russian tech-press convention and matches how the app already presents the term in other locales. The alternative ("права суперпользователя") was rejected as inconsistent and overly literal.
+
+- **Register: formal / impersonal.** Russian wording uses **"Ваше устройство"**, **"Нажмите"**, **"Выберите"** rather than the informal "ты" form (which the existing German and Arabic translations use). This was an explicit choice for a more professional tone.
+
+- **Disclaimer phrasing is impersonal** ("Это приложение НЕ предоставит…") rather than addressing the user directly, which reads more professional in Russian than a literal translation of the English source.
+
+- **`toast_content_copied` → "Скопировано".** This fixes a bug-by-omission in the existing `values-de` and `values-ar` files, where this string was left as the literal English "Content Copied". Russian translates it properly; consider back-porting fixes to the de/ar files.
+
+- **`app_name` kept as "Basic Root Checker"** (Latin script). Both the German and Arabic files keep it in Latin; it is the marketed product name.
+
+- **Brand / proper-noun preservation:** "TelemetryDeck", "topjohnwu", "libsu", "Android", "iboalali", and all URLs are kept verbatim.
+
+- **"МБ"** is the standard Russian abbreviation for megabytes, used in `update_progress_megabytes`.
+
+- **License texts (Apache 2.0, libsu notice, AndroidDeviceNames notice) were NOT translated** — they remain in English because the source XML marks them `translatable="false"`. This is intentional: legal text must stay verbatim, and translating them would also trigger Lint `ExtraTranslation` errors.
+
+## Things preserved verbatim from the English source
+
+These are not translation choices but are worth noting because they are easy to break in subsequent edits:
+
+- `<![CDATA[…]]>` wrapper and `<b>` / `<br>` HTML tags inside `textView_Disclaimer`.
+- `%1$s` / `%2$s` positional placeholders in `update_progress_megabytes` (consumed by the in-app update flow — order must not change).
+- The `#` glyph reference in `textView_checkForRoot`, which refers to the on-screen FAB symbol.
+- Escape sequences: `\n`, `\"`, `\'`, `&#169;`.