Felo

Thieves Cant 5e Translator Online

Swap Common English and Thieves Cant slang in either direction using a fixed paired vocabulary, with unlisted words left untouched. Unlike a bare two-box swapper, it shows which entries matched, resolves multi-word phrases first and can print the full mapping table on request. Try it online.

What is Thieves Cant 5e Translator Online?

Thieves Cant 5e Translator Online is a conversational word-swapping tool for tabletop roleplayers. You paste ordinary English (called Common in most fantasy games) or a line of underworld slang, and it replaces the words and short phrases that appear in a fixed paired vocabulary with their counterpart. Everything else in your sentence stays exactly as you wrote it. It is a dictionary swap, not a grammar engine: it will not conjugate verbs, reorder a sentence or invent new slang.

Key Features

Two-way substitution. Send Common text and get Cant back, or send Cant text and get Common back. The same paired table drives both directions.
Phrase-first matching. Longer entries such as "dangerous road", "lock picks" and "magical wards" are checked before their individual words, so "dangerous road" becomes "cobbled road" rather than being picked apart.
Case-aware output. Matching ignores capitalization, but the replacement copies the shape of the original word, so a sentence-initial "Guard" stays capitalized.
Match report. After the converted text you get a short list of which entries were swapped and which words were left alone, so nothing changes silently.
Mapping table on request. Ask for the table and you get the full Common-to-Cant list in a copyable block.

How to Use

Type or paste your text and say which direction you want, for example "Common to Cant: the thief stole the gold near the docks". If you do not state a direction, the agent infers it from the vocabulary it recognizes and tells you which direction it used.
Read the converted line in the code block, then check the match report underneath to confirm the swaps you expected actually happened.
Ask for refinements in plain language, such as "keep 'gold' unchanged this time" or "show me the table".

Example Use Cases

Prepping a rogue's dialogue. Turn "the guard at the docks wants payment or he will pick the lock" into a line of slang your players can overhear in a tavern.
Decoding a handout. Paste a note your players found and get a plain-English reading so you can decide what the guild was really saying.
Checking your own wording. Write a line of slang for a session, convert it back to Common, and see whether the meaning you intended survives the round trip.

Tips for Best Results

Keep sentences short. The tool swaps words, so a long clause with many unlisted words will come back mostly unchanged, which is expected.
Name the direction explicitly when your text contains words that exist on both sides of the table; it removes any doubt about which way the swap ran.
Round-trip a line (Common to Cant, then back) to spot entries that map many-to-one, such as several English words that share one slang term.

FAQ

What input does it accept?
Plain text, pasted or typed, in English. There is no file upload and no formatting requirement. Very long passages are handled in chunks, and the agent will tell you if it had to split them.

How accurate is the result?
It is exact for the fixed vocabulary: a listed word is replaced and an unlisted word is not. It is not a translation of meaning, grammar or idiom, and it does not draw on any published rulebook beyond the supplied table.

How is this different from some free text tools?
Many free swappers give you two boxes and a result with no explanation. This version states its matching order, preserves capitalization, reports every swap it made and can print the whole vocabulary, so you can audit the output instead of trusting it.

Does it handle punctuation and mixed case?
Yes. Punctuation, spacing and line breaks are preserved, and capitalization follows the original word's shape.