Privacy policy

Version of 15 November 2026

This policy explains what the Lingvokey app for Windows, the Lingvokey Mail browser extension and the lingvokey.eu website do with your data. In short: what you type stays on your computer, we don't use ads or tracking, and we never sell data.

Who is responsible

The data controller is Oleksandr Strekozov IT, ul. Klonowa 3/19, 91-036 Łódź, Poland. Contact: hello@lingvokey.eu.

The keyboard

Lingvokey sees the keys you press so it can notice a word typed in the wrong keyboard layout and fix it. Keystrokes are processed only on your computer and are never sent anywhere. Fixing is turned off in password fields, terminals and games.

What stays on your computer

Settings, the words the app has learned, templates, tasks, dictation history, clipboard history (can be turned off) and a log. They are kept in %APPDATA%\Lingvokey (or the app's own storage when installed from the Microsoft Store). Service keys and sign-in data are encrypted with Windows (DPAPI).

What is sent, to whom and why

• Speech recognition and AI — to Groq, only when you entered your own Groq key and chose the cloud mode: the audio of a dictation and its text. In the local mode audio never leaves your computer.
• Translation — to Groq, DeepL or Google Gemini (in the extension), with your key: the text you ask to translate. With the offline translation models nothing is sent: the text is translated on your computer.
• Model downloads — when you download a speech or translation model, the files come from Hugging Face (huggingface.co) or from our file server models.lingvokey.eu (Cloudflare). These servers see your IP address, as with any download; no text, audio or account data is sent.
• Text from the screen — when the Groq option is on: the image of the screen area you selected, to Groq. With the “Windows only” option the picture is read on your computer.
• Account — to Supabase (servers in the EU, Frankfurt): your e-mail, a device identifier, the computer name, the app version and your subscription status. Needed to sign in and to check Pro.
• Sync (Pro) — to Supabase: templates and some settings. Service keys are never uploaded.
• Payments — to Paddle.com, our reseller and Merchant of Record. Paddle processes your payment details; we never receive card data. See Paddle's privacy policy.
• Backups — only to a folder you choose (for example OneDrive); service keys are not included.
• Release news — if you leave your e-mail on this website: the address, the systems you chose and your language, stored in Supabase; e-mails are sent through Resend. We write only after you confirm the address and only about releases.

The legal bases are: performing our contract with you (account, Pro, sync, payments), your consent (release news, cloud features you turn on) and our legitimate interest in keeping the service secure (for example, limiting sign-up attempts by a hashed IP address).

The Lingvokey Mail extension

The extension works on Gmail pages. It reads the text of the open e-mail to detect your contact's language and, on your command, translates your reply. The contact search opens pages of the website you are viewing. Templates and keys are stored in your browser.

The website

lingvokey.eu uses no analytics, no advertising and no tracking cookies. Your language choice is kept in your browser's local storage.

How long we keep data

Account data — while you have an account; we delete it within 30 days after you ask. Synced data — until you delete it or the account. Release-news addresses — until you unsubscribe or the release e-mail is sent; unconfirmed addresses are deleted after 30 days. Payment records — as long as tax law requires (kept by Paddle).

Your rights

You can ask for a copy of your data, its correction or deletion, restrict or object to processing, and withdraw consent at any time. Local data is removed by deleting the app's folder or with the buttons in Settings. To delete your account and server data, write to hello@lingvokey.eu. You also have the right to complain to your data protection authority.

Children

Lingvokey is not directed at children under 16, and we don't knowingly collect their data.

Changes

If this policy changes, we will publish the new version here with a new date, and announce important changes in the app.