Sensim is designed to provide passive language immersion by replacing selected English words and phrases on webpages with Foreign Language equivalents.The extension stores learning progress and vocabulary unlock status locally on the user’s device using Chrome storage APIs. Sensim does not:sell user data collect personally identifiable information track browsing activity for advertising purposes transfer user data to third parties unrelated to the extension’s functionality Webpage text is processed only for the purpose of performing word replacement and language immersion features.User data is used solely to support the extension’s core educational functionality.