While not a standalone .exe file, you can install it as a desktop app through Google Chrome or Microsoft Edge. This creates a dedicated window and a taskbar icon for quick access.
High-end translation software like DeepL or the mobile versions of Google Translate often allow you to download language packs for offline use. Microsoft Translator skachat i ustanovit na kompiuter
Most modern web-based tools can be "installed" on a computer through a browser shortcut or a dedicated Progressive Web App (PWA). While not a standalone