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RSwitcher

Automatic keyboard layout switcher for Windows 10 & 11. Detects and fixes wrong layout (EN↔RU↔UA) in-place at word boundaries using a bigram+trigram statistical language model, with camelCase/snake_case protection for developers.

// tech_stack

Rust Tauri 2 Win32 WebView2

Visit website View on GitHub

Features

Auto-switching — detects mismatched layout at word boundaries using a bigram+trigram language model (EN↔RU↔UA)
Developer-safe — camelCase and snake_case constructs are protected from false-positive switching
Dictionary Guard — top 3000 common words per language immune to false-positive switching
Undo Feedback Whitelist — undo a switch to auto-whitelist the word permanently
Customizable sensitivity — tune detection thresholds per language
Per-application exclusions — disable auto-switching entirely for specific apps
App-Specific Contexts — raised sensitivity thresholds inside IDEs and terminals
System tray — runs quietly in the background
Tabbed settings panel — General, Hotkeys, and Exceptions tabs
Atomic config persistence — write-to-temp-then-rename strategy, never partially written, fully portable JSON config
Panic-safe FFI hooks — Rust panics never cross extern boundary, typing always continues

Hotkeys

Win+Shift — force-convert the current word
Win+Backspace — undo the last conversion and whitelist the word

Privacy & footprint

Fully offline — no cloud dependencies, no telemetry. Under 15 MB RAM at idle.

System Requirements

Windows 10 / 11 (x86-64) — macOS and Linux support announced as coming soon
EN, RU, and UA keyboard layouts installed

cd ../products