diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a36189..4effc95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and
 
 ## [Unreleased]
 
+## [1.1.0] - 2026-05-18
+### Added
+- Russian UI translation. On first launch the application asks which language to use (`1) English`, `2) Русский`) and writes the answer to a fresh `config.ini` next to `netswitch.exe`. To change the language later, edit `language = en` / `language = ru` in that file — the comment at the top of the file explains how, in both languages.
+- Bilingual `README.ru.md` linked from the main `README.md`.
+
 ## [1.0.3] - 2026-05-17
 ### Changed
 - Update check no longer interrupts startup with an interactive prompt. If a newer release is available, a quiet right-aligned `update available (vX.Y.Z)` hint is printed in dim grey directly under the banner — no key press required.
@@ -31,7 +36,8 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and
 - Auto-update check on startup: polls GitHub `/releases/latest` with a 3-second timeout and offers to open the download page if a newer version exists. Silent on offline / API errors.
 - MIT licensed.
 
-[Unreleased]: https://github.com/Engelgardt23/netswitch/compare/v1.0.3...HEAD
+[Unreleased]: https://github.com/Engelgardt23/netswitch/compare/v1.1.0...HEAD
+[1.1.0]: https://github.com/Engelgardt23/netswitch/compare/v1.0.3...v1.1.0
 [1.0.3]: https://github.com/Engelgardt23/netswitch/compare/v1.0.2...v1.0.3
 [1.0.2]: https://github.com/Engelgardt23/netswitch/compare/v1.0.1...v1.0.2
 [1.0.1]: https://github.com/Engelgardt23/netswitch/compare/v1.0.0...v1.0.1
diff --git a/README.md b/README.md
index aee3f82..484f5f0 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 [![Latest release](https://img.shields.io/github/v/release/Engelgardt23/netswitch)](https://github.com/Engelgardt23/netswitch/releases/latest)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 
+🇬🇧 English | [🇷🇺 На русском](README.ru.md)
+
 A tiny portable tool to flip a Windows network adapter between a **static IP** and **DHCP** with a few keystrokes.
 
 Built for the recurring engineer chore of "give my laptop NIC 10.10.10.1 so I can talk to a server's BMC" and "now put it back on DHCP so I can have internet again."
diff --git a/README.ru.md b/README.ru.md
new file mode 100644
index 0000000..03767e1
--- /dev/null
+++ b/README.ru.md
@@ -0,0 +1,62 @@
+# netswitch
+
+[![Последний релиз](https://img.shields.io/github/v/release/Engelgardt23/netswitch)](https://github.com/Engelgardt23/netswitch/releases/latest)
+[![Лицензия: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+
+[🇬🇧 English](README.md) | 🇷🇺 На русском
+
+Маленький портативный инструмент, который за пару нажатий переключает сетевой адаптер Windows между **статическим IP** и **DHCP**.
+
+Решает регулярную задачу инженера: «дай моему ноуту 10.10.10.1, чтобы я мог достучаться до BMC сервера», а потом «верни обратно на DHCP, чтобы был интернет».
+
+> **Автор: engelgardt.**
+
+---
+
+## Скачать
+
+Последний релиз: [**страница релизов**](https://github.com/Engelgardt23/netswitch/releases/latest).
+Архив `netswitch-portable-vX.Y.Z.zip` (~30 КБ).
+
+## Запуск
+
+1. Распакуй куда угодно.
+2. Двойной клик по `netswitch.exe`.
+3. **При первом запуске** программа спросит язык интерфейса (1 — English, 2 — Русский). Ответ запишется в `config.ini` рядом с exe — потом можно поменять руками.
+4. Подтверди UAC (admin нужен для `netsh interface ipv4 set address`).
+5. Выбери сетевой адаптер из списка.
+6. Выбери режим:
+   - **Статический**: введи IP (по умолчанию `10.10.10.1`), маску (по умолчанию `255.255.255.0`), шлюз (опционально).
+   - **DHCP**: подтверди — адаптер вернётся в DHCP для IP и DNS.
+
+## Что фильтруется
+
+В выбор попадают только настоящие проводные физические адаптеры. Wi-Fi, VPN, виртуалки, Hyper-V, VMware, VirtualBox, TAP/TUN, WireGuard, OpenVPN, Tailscale, ZeroTier, Bluetooth, Loopback, WAN Miniport — всё пропускается.
+
+## Проверка обновлений
+
+При каждом запуске тулза стучится в GitHub `/releases/latest` (таймаут 3 секунды). Если есть свежая версия — справа в шапке появится тусклая надпись `доступно обновление (vX.Y.Z)`. Если интернета нет — молчит.
+
+## Конфиг
+
+При первом запуске рядом с `netswitch.exe` появится `config.ini`:
+
+```ini
+# Чтобы сменить язык интерфейса, измените 'language' ниже.
+# Допустимые значения: en, ru
+[General]
+language = ru
+```
+
+## Сборка из исходников
+
+Скрипт один — `netswitch.ps1`. Для пересборки `.exe`:
+
+```
+Install-Module ps2exe -Scope CurrentUser
+Invoke-ps2exe -inputFile netswitch.ps1 -outputFile netswitch.exe -requireAdmin -title "netswitch" -version 1.1.0.0
+```
+
+## Лицензия
+
+MIT — см. [LICENSE](LICENSE).
diff --git a/src/netswitch.ps1 b/src/netswitch.ps1
index e595a25..062e4b8 100644
--- a/src/netswitch.ps1
+++ b/src/netswitch.ps1
@@ -1,7 +1,7 @@
-# netswitch v1.0.0 - quick NIC IP / DHCP toggle
+# netswitch - quick NIC IP / DHCP toggle
 # made by engelgardt
 
-$NetswitchVersion = '1.0.3'
+$NetswitchVersion = '1.1.0'
 $GithubRepo       = 'Engelgardt23/netswitch'
 
 $ErrorActionPreference = 'Stop'
@@ -19,6 +19,125 @@ if (-not $me.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
     exit
 }
 
+# --- Locate config.ini next to the exe / script ---
+function Get-AppDir {
+    if ($PSCommandPath) { return (Split-Path $PSCommandPath -Parent) }
+    try {
+        return Split-Path ([System.Diagnostics.Process]::GetCurrentProcess().MainModule.FileName) -Parent
+    } catch {
+        return (Get-Location).Path
+    }
+}
+$AppDir     = Get-AppDir
+$ConfigPath = Join-Path $AppDir 'config.ini'
+
+# --- Bilingual UI strings ---
+$STR = @{
+    en = @{
+        no_adapters       = 'No physical wired adapters found.'
+        press_enter       = 'Press Enter to exit'
+        available_adapters = 'Available adapters:'
+        select_adapter    = 'Select adapter number'
+        invalid_selection = 'Invalid selection.'
+        selected          = 'Selected: {0}'
+        mode_header       = 'Mode:'
+        mode_static       = '  1) Static IP'
+        mode_dhcp         = '  2) DHCP'
+        mode_choice       = 'Choice [1]'
+        setting_dhcp      = 'Setting {0} to DHCP...'
+        done              = 'Done.'
+        ip_prompt         = 'IP address [10.10.10.1]'
+        mask_prompt       = 'Subnet mask [255.255.255.0]'
+        gw_prompt         = 'Gateway (Enter to skip)'
+        setting_static    = 'Setting {0} -> {1} / {2}{3}'
+        via_gw            = ' via {0}'
+        current_config    = 'Current IPv4 config:'
+        update_available  = 'update available ({0})'
+        lang_select       = 'Select language / Выберите язык:'
+        lang_en           = '  1) English'
+        lang_ru           = '  2) Русский'
+        lang_invalid      = 'Please enter 1 or 2 / Введите 1 или 2'
+        banner_subtitle   = 'NIC IP/DHCP toggle'
+    }
+    ru = @{
+        no_adapters       = 'Подходящие проводные адаптеры не найдены.'
+        press_enter       = 'Нажмите Enter для выхода'
+        available_adapters = 'Доступные адаптеры:'
+        select_adapter    = 'Введите номер адаптера'
+        invalid_selection = 'Неверный выбор.'
+        selected          = 'Выбрано: {0}'
+        mode_header       = 'Режим:'
+        mode_static       = '  1) Статический IP'
+        mode_dhcp         = '  2) DHCP'
+        mode_choice       = 'Выбор [1]'
+        setting_dhcp      = 'Перевожу {0} в режим DHCP...'
+        done              = 'Готово.'
+        ip_prompt         = 'IP-адрес [10.10.10.1]'
+        mask_prompt       = 'Маска подсети [255.255.255.0]'
+        gw_prompt         = 'Шлюз (Enter — пропустить)'
+        setting_static    = 'Назначаю {0} -> {1} / {2}{3}'
+        via_gw            = ' через {0}'
+        current_config    = 'Текущая конфигурация IPv4:'
+        update_available  = 'доступно обновление ({0})'
+        lang_select       = 'Select language / Выберите язык:'
+        lang_en           = '  1) English'
+        lang_ru           = '  2) Русский'
+        lang_invalid      = 'Please enter 1 or 2 / Введите 1 или 2'
+        banner_subtitle   = 'переключатель NIC IP/DHCP'
+    }
+}
+
+# --- First-run language prompt + config write ---
+function Read-Language {
+    Write-Host ''
+    Write-Host $STR.en.lang_select
+    Write-Host $STR.en.lang_en
+    Write-Host $STR.en.lang_ru
+    while ($true) {
+        $c = (Read-Host '>').Trim()
+        if ($c -eq '1') { return 'en' }
+        if ($c -eq '2') { return 'ru' }
+        Write-Host $STR.en.lang_invalid -ForegroundColor Yellow
+    }
+}
+
+function Write-DefaultConfig([string]$lang) {
+    $header = @"
+# ---------------------------------------------------------------------------
+# netswitch configuration
+#
+# To change the interface language, edit the 'language' value below.
+# Valid values: en, ru
+#
+# Чтобы сменить язык интерфейса, измените значение 'language' ниже.
+# Допустимые значения: en, ru
+# ---------------------------------------------------------------------------
+
+[General]
+language = $lang
+"@
+    try { Set-Content -Path $ConfigPath -Value $header -Encoding UTF8 } catch { }
+}
+
+function Read-Config {
+    if (-not (Test-Path $ConfigPath)) {
+        $l = Read-Language
+        Write-DefaultConfig $l
+        return @{ language = $l }
+    }
+    $lang = 'en'
+    foreach ($line in (Get-Content $ConfigPath -ErrorAction SilentlyContinue)) {
+        if ($line -match '^\s*language\s*=\s*([a-zA-Z]+)\s*$') {
+            $v = $matches[1].ToLower()
+            if ($v -eq 'ru' -or $v -eq 'en') { $lang = $v }
+        }
+    }
+    return @{ language = $lang }
+}
+
+$config = Read-Config
+$L      = $STR[$config.language]
+
 # --- Update check (silent: returns latest tag if newer, else empty) ---
 function Get-NetswitchUpdate {
     try {
@@ -33,11 +152,11 @@ function Get-NetswitchUpdate {
             while ($parts.Count -lt 3) { $parts += 0 }
             ,$parts[0..2]
         }
-        $L = & $toTuple $latest
-        $C = & $toTuple $NetswitchVersion
+        $LV = & $toTuple $latest
+        $CV = & $toTuple $NetswitchVersion
         for ($i = 0; $i -lt 3; $i++) {
-            if ($L[$i] -gt $C[$i]) { return $r.tag_name }
-            if ($L[$i] -lt $C[$i]) { return '' }
+            if ($LV[$i] -gt $CV[$i]) { return $r.tag_name }
+            if ($LV[$i] -lt $CV[$i]) { return '' }
         }
         return ''
     } catch {
@@ -47,19 +166,19 @@ function Get-NetswitchUpdate {
 $latestTag = Get-NetswitchUpdate
 
 # --- Banner ---
-Write-Host ""
-Write-Host "==============================================" -ForegroundColor Cyan
-Write-Host "  netswitch v$NetswitchVersion - NIC IP/DHCP toggle" -ForegroundColor Cyan
-Write-Host "==============================================" -ForegroundColor Cyan
+Write-Host ''
+Write-Host '==============================================' -ForegroundColor Cyan
+Write-Host ("  netswitch v$NetswitchVersion - " + $L.banner_subtitle) -ForegroundColor Cyan
+Write-Host '==============================================' -ForegroundColor Cyan
 if ($latestTag) {
-    $msg = "update available ($latestTag)"
+    $msg = ($L.update_available -f $latestTag)
     $w = 0
     try { $w = $Host.UI.RawUI.WindowSize.Width } catch { $w = 0 }
     if ($w -lt ($msg.Length + 2)) { $w = $msg.Length + 2 }
     $pad = $w - $msg.Length - 1
     Write-Host ((' ' * [Math]::Max(0, $pad)) + $msg) -ForegroundColor DarkGray
 }
-Write-Host ""
+Write-Host ''
 
 # --- Pick adapter (physical wired only) ---
 $skipDescriptionPattern = 'VPN|Virtual|AnyConnect|TAP-|TUN-|Bluetooth|Loopback|WAN Miniport|Hyper-V|VMware|VirtualBox|WireGuard|OpenVPN|Tailscale|ZeroTier'
@@ -74,11 +193,11 @@ $adapters = @(Get-NetAdapter | Where-Object {
 } | Sort-Object ifIndex)
 
 if ($adapters.Count -eq 0) {
-    Write-Host "No physical wired adapters found." -ForegroundColor Red
-    Read-Host "Press Enter to exit"; exit 1
+    Write-Host $L.no_adapters -ForegroundColor Red
+    Read-Host $L.press_enter; exit 1
 }
 
-Write-Host "Available adapters:"
+Write-Host $L.available_adapters
 for ($i = 0; $i -lt $adapters.Count; $i++) {
     $a = $adapters[$i]
     $ips = (Get-NetIPAddress -InterfaceIndex $a.ifIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue |
@@ -87,56 +206,58 @@ for ($i = 0; $i -lt $adapters.Count; $i++) {
 }
 
 do {
-    $sel = (Read-Host "Select adapter number").Trim()
+    $sel = (Read-Host $L.select_adapter).Trim()
     $valid = ($sel -match '^\d+$') -and ([int]$sel -ge 1) -and ([int]$sel -le $adapters.Count)
-    if (-not $valid) { Write-Host "Invalid selection." -ForegroundColor Red }
+    if (-not $valid) { Write-Host $L.invalid_selection -ForegroundColor Red }
 } while (-not $valid)
 $nic = $adapters[[int]$sel - 1]
-Write-Host ""
-Write-Host "Selected: $($nic.Name)" -ForegroundColor Green
+Write-Host ''
+Write-Host ($L.selected -f $nic.Name) -ForegroundColor Green
 
 # --- Mode ---
-Write-Host ""
-Write-Host "Mode:"
-Write-Host "  1) Static IP"
-Write-Host "  2) DHCP"
-$modeChoice = Read-Host "Choice [1]"
+Write-Host ''
+Write-Host $L.mode_header
+Write-Host $L.mode_static
+Write-Host $L.mode_dhcp
+$modeChoice = Read-Host $L.mode_choice
 if ([string]::IsNullOrWhiteSpace($modeChoice)) { $modeChoice = '1' }
 
 if ($modeChoice.Trim() -eq '2') {
     # --- DHCP ---
-    Write-Host ""
-    Write-Host "Setting $($nic.Name) to DHCP..." -ForegroundColor Yellow
+    Write-Host ''
+    Write-Host ($L.setting_dhcp -f $nic.Name) -ForegroundColor Yellow
     $null = & netsh interface ipv4 set address name="$($nic.Name)" source=dhcp 2>&1
     $null = & netsh interface ipv4 set dnsservers name="$($nic.Name)" source=dhcp 2>&1
-    Write-Host "Done." -ForegroundColor Green
+    Write-Host $L.done -ForegroundColor Green
 }
 else {
     # --- Static ---
-    $ip = Read-Host "IP address [10.10.10.1]"
+    $ip = Read-Host $L.ip_prompt
     if ([string]::IsNullOrWhiteSpace($ip)) { $ip = '10.10.10.1' }
 
-    $mask = Read-Host "Subnet mask [255.255.255.0]"
+    $mask = Read-Host $L.mask_prompt
     if ([string]::IsNullOrWhiteSpace($mask)) { $mask = '255.255.255.0' }
 
-    $gw = Read-Host "Gateway (Enter to skip)"
+    $gw = Read-Host $L.gw_prompt
 
-    Write-Host ""
-    Write-Host "Setting $($nic.Name) -> $ip / $mask$( if ($gw) { " via $gw" })" -ForegroundColor Yellow
+    $gwTail = if ([string]::IsNullOrWhiteSpace($gw)) { '' } else { ($L.via_gw -f $gw) }
+
+    Write-Host ''
+    Write-Host ($L.setting_static -f $nic.Name, $ip, $mask, $gwTail) -ForegroundColor Yellow
 
     if ([string]::IsNullOrWhiteSpace($gw)) {
         $null = & netsh interface ipv4 set address name="$($nic.Name)" static $ip $mask 2>&1
     } else {
         $null = & netsh interface ipv4 set address name="$($nic.Name)" static $ip $mask $gw 2>&1
     }
-    Write-Host "Done." -ForegroundColor Green
+    Write-Host $L.done -ForegroundColor Green
 }
 
 # --- Show current state ---
-Write-Host ""
-Write-Host "Current IPv4 config:" -ForegroundColor Cyan
+Write-Host ''
+Write-Host $L.current_config -ForegroundColor Cyan
 Get-NetIPAddress -InterfaceIndex $nic.ifIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue |
     Where-Object { $_.PrefixOrigin -ne 'WellKnown' } |
     Format-Table IPAddress, PrefixLength, PrefixOrigin -AutoSize
 
-Read-Host "Press Enter to exit"
+Read-Host $L.press_enter