Felo

Secret Language Translator M&L Online – Backward Alphabet Cipher

Encode or decode the Mark and Luke secret language: every lowercase letter becomes its reverse-alphabet partner and every digit flips to its mirror. Unlike a bare two-box page, it handles whole words without spacing letters apart, states its uppercase rule, and preserves punctuation exactly. Try it online.

What is Secret Language Translator M&L Online – Backward Alphabet Cipher?

This is a conversational version of the playful backward-alphabet cipher often called the Mark and Luke secret language. You type ordinary English and get coded text back, or you paste coded text and get the English back. The rule is simple and fully reversible: a becomes z, b becomes y, and so on to z becoming a; the digits flip the same way, with 1 becoming 0, 2 becoming 9, and 0 becoming 1.

The original page does this with two text boxes side by side. This agent does the same job in chat, with one important practical difference: you do not have to put a space between every letter. Whole words, sentences, and paragraphs are converted as typed, and anything the cipher does not cover — punctuation, emoji, accented letters — comes back untouched.

Key Features

Exact reverse-alphabet encoding. All 26 lowercase letters map to their mirror partner, and all ten digits map to their reverse digit, following the same paired lists used by the original tool.
Decoding in the same request. Paste secret text and ask for it back in English; the mapping is symmetric, so the same table runs in reverse.
Whole-word handling. No letter-spacing workaround is needed. "hello" becomes "svool" directly.
Stated uppercase rule. Uppercase letters are converted and returned in uppercase, so "Hello" becomes "Svool" rather than being left half-converted.
Preservation and reporting. Spaces, line breaks, punctuation, and unsupported symbols are kept exactly, and the agent tells you which characters it did not convert.
Random coded sentence. Ask for a random sentence and get a short English line plus its coded form.

How to Use

Type your text and say what you want. For example: "Encode this: meet me at the park at 7." If you just paste plain English with no instruction, the agent encodes it.
Read the coded line in the copyable block. A short mapping note follows so you can check a letter or two yourself.
To go the other way, paste the coded text and say "decode". The agent returns the English and confirms that every character round-tripped.

Example Use Cases

Passing notes with a friend. Encode "see you after class" into "hvv blf zuvj xozhh" and hand it over; your friend pastes it back to decode.
Checking a backward alphabet cipher answer. If you solved a puzzle by hand, paste your answer and ask the agent to decode it and confirm whether it reads as sensible English.
Making a coded clue for a game or scavenger hunt. Encode a short instruction with numbers, like "open box 3 at 9", and keep the plain version for yourself.

Tips for Best Results

Say "encode" or "decode" when the direction is not obvious; a string of letters can look like either.
Keep the original text if you plan to decode later — the cipher is symmetric, so encoding twice returns the original.
If you need a specific capitalization style in the output, say so; otherwise uppercase input stays uppercase.

FAQ

What input does it accept?
Any plain text you can type or paste: words, sentences, multiple lines, digits, and punctuation. There is no file upload. Very long passages are handled in sections, and the agent tells you if it splits them.

How accurate is the result?
The mapping is deterministic, so the same input always gives the same output. Lowercase letters and digits follow the exact reverse table; uppercase letters follow the stated uppercase rule; everything else is preserved unchanged. The agent reports any character it did not convert rather than dropping it.

How is this different from the original page?
Some free text tools ask you to space letters apart when typing words and only define lowercase letters. This agent converts whole words directly, states how uppercase is handled, explains the mapping, and reports preserved characters. It does not add accounts, saved history, sound, or font files.

Can I decode as well as encode?
Yes. The mapping is its own inverse, so the same table decodes. Just say "decode" or paste text that is clearly coded.

Does it produce an image or audio?
No. The output is copyable text only.