macOS MENU BAR APP

Type in the Right Language.
Every Time.

LangKey gives each modifier key its own language — no more toggling, no more wrong-language mistakes.

Download Free ↓ See How It Works →
macOS 14+ · Free trial available
🇰🇷 ⌨️
📶 🔋
9:41 AM
⌨️ LangKey
Left ⇧
🇺🇸
English
ABC
Right ⇧ ●
🇰🇷
한국어
두벌식
Left ⌃
🇯🇵
日本語
ローマ字
Right ⌃
🇨🇳
中文
拼音
Add Language... Quit LangKey
🇰🇷
한국어
The Problem

Sound familiar?

With 3+ languages, toggling is a gamble — you never know where you'll land.

Without LangKey
Intended:
나는
What happens:
↻ switching language...
With LangKey
Right ⇧
→
🇰🇷 한국어
Result:
✓
Features

One Key. One Language. Always.

🌐
8 Built-In Keys
Map both sides of Shift, Control, Option, and Command, then add up to 10 custom key mappings.
🎯
No More Toggling
Each key is dedicated. Tap Right ⇧ — it's always Korean. No guessing, no surprises.
👁
Instant Visual Feedback
A brief overlay shows the flag and language name every time you switch. You always know where you are.
⌨️
Works with Your Shortcuts
Only triggers on a clean quick tap (< 0.3s). Cmd+Shift, Ctrl+C — all your shortcuts still work perfectly.
Setup

How It Works

1
Map Your Keys
Open LangKey from the menu bar. Assign input sources to 8 built-in modifier keys, or add custom key mappings.
L-Shift ⇧🇺🇸 English
R-Shift ⇧🇰🇷 한국어
L-Ctrl ⌃🇯🇵 日本語
R-Ctrl ⌃🇨🇳 中文
2
Tap to Switch
Tap the modifier key for the language you need. A brief overlay confirms which language you're now in.
R-Shift ⇧ →
🇰🇷한국어
3
Type Confidently
You know exactly which language you're in. No more wrong-language surprises.
나는 학생입니다
✓ Correct language

Download LangKey

LangKey is now available to try for free. Download the macOS app and start using dedicated language keys.

Download Free ↓

Requires macOS 14.0 or later · Accessibility permission required