Cookie Policy & Web Tracking
Last Updated: March 1, 2026
1. Comprehensive Cookie Usage
Cookies are small data files stored on your device. We use 'Essential Cookies' for authentication (staying logged in) and 'Preference Cookies' to remember your selected language preference.
2. Advertising & Analytics
We use third-party cookies from Google AdSense to serve advertisements. Google and its partner websites use cookies to serve personalized ads based on your visits to this and other websites. You can manage your cookie preferences or completely opt out of personalized advertising at any time by visiting Google Ads Settings. For general third-party cookie opt-out, please visit AboutAds.
3. Specific Cookies & Local Storage We Use
The table below lists every cookie or browser local storage entry that Hangul Playground writes to your device. We deliberately keep this list short — most learners only ever interact with the first three rows.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
| sb-*-auth-token | Supabase | Keeps you signed in across visits so you do not need to re-enter your password every time. | Up to 7 days (refreshed on use) |
| cookie_consent (localStorage) | Hangul Playground | Remembers your GDPR/CCPA cookie choice. Until you accept, advertising is served in non-personalized mode. | Until you clear browser data |
| i18nextLng (localStorage) | Hangul Playground | Remembers your selected interface language (Korean, English, Japanese, Spanish, or Arabic). | Until you clear browser data |
| __cf_bm | Cloudflare | Cloudflare bot management — protects the platform from automated abuse and credential stuffing. | 30 minutes |
| IDE, NID, _gads | Google AdSense | Google AdSense — serves and measures advertisements. Personalization is OFF until you accept the cookie banner. | Up to 13 months |
4. How to Manage or Revoke Cookies
You can clear all cookies through your browser's privacy settings (Chrome, Safari, Firefox, Edge all expose this in 'Clear browsing data'). To revoke our cookie consent specifically without wiping everything, open DevTools → Application → Local Storage and delete the 'cookie_consent' key — the banner will reappear on your next visit. Using Incognito/Private mode also disables persistent cookies entirely. Disabling cookies will sign you out and reset your language choice, but the games and learning tools will continue to work.