langstack

A language learning skill pack for Claude Code.

Learn any language with 8 AI-powered slash commands — grammar tutoring, vocabulary drills, conversation practice, writing feedback, and more. Language-agnostic, works for any target language.

Inspired by garrytan/gstack.

Works with Claude Code

Skills

Skill	Role	What it does
/tutor	Grammar & vocabulary tutor	Explains any concept with examples, rules, common mistakes, and a comprehension check
/vocab-drill	Vocabulary quiz master	Flashcard-style drilling with mixed question types and session scoring
/conversation	Roleplay conversation partner	Practices real scenarios (cafe, interview, etc.) with inline corrections
/writing-coach	Writing reviewer	Grades writing, annotates every error, provides corrected rewrite
/grammar-check	Grammar auditor	Quick error scan with rule explanations and severity ratings
/lesson-plan	Curriculum designer	Generates a multi-week study plan with daily tasks and milestones
/pronunciation	Pronunciation coach	IPA transcription, mouth position guides, and practice sequences
/translate-explain	Translation analyst	Translates with nuance, register, idiom, and cultural context analysis

Install

Quick install (recommended)

git clone https://github.com/richardvt/langstack.git
cd langstack
./setup

Manual install

Copy the skill files to your Claude Code skills directory:

mkdir -p ~/.claude/commands
cp skills/*.md ~/.claude/commands/

Usage

Once installed, open Claude Code and type any skill as a slash command:

/tutor What's the difference between ser and estar in Spanish?

/vocab-drill Japanese food vocabulary, 10 questions

/conversation Practice ordering coffee in French, intermediate level

/lesson-plan I want to learn Korean for a trip in 2 months, complete beginner, 4 hours/week

Skill chaining

Skills are designed to work together. A natural learning flow:

1. /lesson-plan — Create your study roadmap
2. /tutor — Dive into grammar concepts from your plan
3. /vocab-drill — Drill the vocabulary for each week
4. /pronunciation — Nail the tricky sounds
5. /conversation — Practice in realistic scenarios
6. /writing-coach — Get feedback on your writing
7. /translate-explain — Understand nuances in things you read

License

MIT — see LICENSE.