LangWitch
LangWitch · Other
LangWitch is an AI conlang creator and constructed language tool. It helps you design a language from its sound system up, then build a lexicon, inflection rules, and translation in one place.
About LangWitch
What Is LangWitch
LangWitch is a web-based toolkit for people who build their own languages, a hobby and craft known as conlanging. It targets writers inventing an alien tongue for fiction, worldbuilders fleshing out a fantasy empire, and linguistics fans who simply enjoy the puzzle. Rather than juggling spreadsheets and scattered notes, you design a language in one workspace that keeps phonology, grammar, and vocabulary connected.
The core promise is structure. You define a sound system, set grammar rules like cases and tenses, and the platform applies those rules across your vocabulary automatically. When you want to see the language in use, an AI translator turns English sentences into your conlang while respecting the morphology you've set up. A word generator, called WordMage, invents new words that stay phonologically consistent with the rest.
The biggest limit is the free ceiling. Free accounts cap you at 200 words and 15 AI assistant messages plus 15 translations per month, so anyone building a serious language will hit the paywall fairly quickly. There's also no public API, so you can't script the tool into your own workflow.
Getting Started
- Create a free account on the official site, no credit card needed.
- Open the phonology editor and use the interactive IPA phoneme selector to pick the sounds your language will allow.
- Define grammar rules next, setting up cases, tenses, moods, and any custom features.
- Build inflection paradigms so your rules apply to words automatically, then start adding vocabulary.
- Use WordMage to generate consistent words and the AI translator to test full English sentences in your language.
Product Information
A quick look at LangWitch's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Fiction writers
- Worldbuilders
- Linguistics hobbyists
Tasks
- Designing a sound system
- Setting up grammar
- Growing a lexicon
- Translating English sentences
Scenarios
- Drafting a language for a novel or game
- Building a shared conlang for a group project
- Studying how languages work
Key features
Interactive IPA Phoneme Selector
LangWitch starts with sound. You pick which phonemes your language allows from an interactive IPA selector, which sets the boundaries for every word you build later. Locking sounds down early keeps new vocabulary from drifting into spellings or pronunciations that don't belong, so your constructed language stays internally consistent from the first entry.
Semantic Lexicon Search
Instead of scrolling a flat word list, you search your lexicon by meaning. Semantic search shows which concepts your language already covers and which ones you've left gaps in, with lexical targets tracking the missing pieces. For a large vocabulary this turns "do I have a word for this?" from a manual hunt into a quick lookup.
Inflection Engine
The inflection system lets you build morphological paradigms that apply automatically across your whole vocabulary. You define how words change for tense, case, number, or any grammatical feature you need, using prefixes, suffixes, reduplication, and more. Overrides let you break the pattern for a specific word or feature when natural language refuses to stay tidy.
AI-Powered Translation
The translator converts English sentences into your conlang rather than doing word-for-word swaps. It applies your inflection rules on its own and follows your syntax, including word orders like subject-object-verb, so the output reads like your language instead of a cipher. This is the fastest way to see whether your grammar rules actually hold up under real sentences.
WordMage Word Generation
WordMage doubles as a conlang word generator. It creates new words on demand that stay phonologically consistent with your existing system. Instead of inventing syllables by hand and second-guessing whether they fit, you ask for a word and get one that obeys your sound rules. It's useful when a translation dead-ends on a missing term and you need a plausible word fast.
Rules That Scale With Your Language
Because grammar, phonology, and vocabulary live in the same place, one rule change ripples through the parts of your language that depend on it. The platform is built to grow from a handful of words to a fully documented grammar. For long projects this means less drift between what you decided early and what you're adding months later.
Pros and cons
Pros
- Keeps phonology, grammar, and vocabulary in one workspace so nothing drifts out of sync.
- The inflection engine applies your morphological rules across the whole lexicon automatically.
- AI translation respects the rules you defined, including word order and inflection, instead of swapping words one by one.
- WordMage generates new words that fit your sound system, so you're not guessing at plausible syllables.
- Full data export is included even on the free plan, so you're not locked in.
Cons
- The free plan caps you at 200 words and 15 AI messages plus 15 translations a month, which is tight for serious projects.
- No public API means you can't automate LangWitch or connect it to your own tools.
- Editing stops once you hit the free word limit until you delete words or upgrade, and your newest words lock first.
- It's a browser-only tool with no offline mode, so you need a connection to keep working.
Frequently asked questions
LangWitch is a tool for creating constructed languages. You use it to design a sound system, set grammar and inflection rules, build a vocabulary, and translate English sentences into your own language, all in one place.
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