Mistral Prompt to Correct a Text

Mistral, the French AI model developed by Mistral AI, excels in natural language processing and text correction in French. Thanks to its training on a vast multilingual corpus with special attention to French, Mistral understands the subtleties of French grammar, spelling, and syntax better than many of its competitors. Whether you are a writer, student, professional, or content creator, using Mistral to correct your texts allows you to obtain precise corrections that respect your writing style while eliminating errors. Unlike a simple spell checker, Mistral analyzes the overall context of your sentences to propose relevant grammatical, syntactic, and stylistic corrections. It can identify complex errors such as past participle agreements, tense sequences, anglicisms, or awkward phrasing. By structuring your prompt correctly, you will get a corrected text with clear explanations for each modification, allowing you not only to improve your text immediately but also to make lasting progress in writing.

The prompt

Mistral

You are a professional proofreader expert in French. Correct the following text by applying these rules:

Spelling: correct all spelling mistakes, including accents, hyphens, and capital letters.
Grammar: correct agreements (subject-verb, adjectives, past participles), conjugations, and gender/number errors.
Syntax: rephrase awkward or ambiguous sentences while preserving the original meaning.
Punctuation: correct missing, excessive, or misplaced punctuation.
Style: flag repetitions, pleonasms, and heavy phrasing without altering the author's tone.

For each correction, use this format:

❌ Before: [original text]
✅ After: [corrected text]
💡 Rule: [short grammatical explanation]

At the end, provide the fully corrected text in a separate block.

Text to correct:
"""
[PASTE YOUR TEXT HERE]
"""

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Why it works

This prompt works thanks to the attribution of a precise expert role that activates Mistral's linguistic knowledge, combined with a clear taxonomy of error types to detect. The structured output format (before/after/rule) forces the model to justify each correction, which reduces false positives and unnecessary modifications. Finally, the instruction to respect the author's tone prevents Mistral from rewriting the text instead of simply correcting it.

Expected result

You will obtain a detailed list of all identified corrections, each accompanied by the original text, the corrected version, and the corresponding grammatical rule. The fully corrected text will be presented at the end in a separate block, ready to be copied and pasted. Corrections will cover spelling, grammar, syntax, punctuation, and stylistic suggestions.

Variants by level

FAQ

Which Mistral model to choose for text correction?

For text correction in French, Mistral Large offers the best results thanks to its deep understanding of grammatical and stylistic nuances. Mistral Medium is a good compromise between quality and speed for everyday texts. Mistral Small may suffice for simple spelling corrections, but it risks missing complex syntactic errors or stylistic subtleties. If you are using the API, Mistral Large is recommended for important documents.

Can Mistral correct a long text without losing quality?

Mistral handles moderate-length texts (up to 2000-3000 words) well without notable loss of quality. For longer texts, it is better to split them into logical sections (chapters, thematic paragraphs) and submit them separately. This allows the model to maintain focus on each segment and avoid oversights. Remember to specify the overall context of the text at the beginning of each section so that Mistral maintains terminological consistency.

How to prevent Mistral from rewriting my text instead of correcting it?

The key is to be explicit in your prompt: specify that you only want corrections and not a rewrite. Add instructions like 'preserve the author's tone and style,' 'only rephrase grammatically incorrect sentences,' or 'flag stylistic suggestions separately without applying them.' If Mistral modifies your text too much, you can also ask it to classify its interventions into 'mandatory corrections' and 'optional suggestions' to keep control over the final result.

How to use this prompt

Copy the prompt with the button above.
Paste it into ChatGPT, Claude or your favorite AI assistant.
Replace the bracketed variables with your details, then refine the result.

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