Can AI-Generated Text Be Identified?
Discover why simple AI content generation is no longer enough at an industrial scale. This article analyzes the visible and invisible traces left by LLMs and proposes a rigorous post-production method to guarantee the technical and editorial quality of your publications.

01
Is Your AI-Generated Text Really Like Any Other Text?
When you ask an artificial intelligence to write 5,000 product descriptions for your CMS, you get a mass of textual data ready for use. However, this apparent fluidity masks technical and editorial realities that can weaken your digital infrastructure. Publishing raw content without control exposes your company to risks of invisibility or major technical malfunctions.
The first challenge is editorial quality. AIs often use em dashes, systematic emojis, and repetitive sentence structures. These writing tics make the text immediately identifiable as artificial, which can damage your brand's perception by your customers.
On a technical level, AIs frequently insert invisible characters or exotic Unicode codes. A character like U+200B (zero-width space) inserted in a product reference can block your CSV imports, distort internal searches, or break your APIs. Visually, the text looks identical; computationally, it is corrupted.
Finally, the lack of metadata governance and traceability raises the question of ownership and compliance with platform rules. AI text is not just text: it is complex data that requires verification before any injection into your business tools.
Generation is only the beginning; control is the truly critical step.
02
Not All "AI Traces" Are Watermarks
There is frequent confusion between the different types of signatures left by an AI. To industrialize your production, it is crucial to understand that AIs can leave traces in multiple ways.
The different types of traces are as follows:
- Visible artifacts: Emojis, Anglo-Saxon typographic quotation marks, systematic bulleted lists.
- Invisible artifacts: Non-breaking spaces, zero-width characters, homoglyphs (letters from different alphabets that look visually similar).
- Stylistic signature: Recurring vocabulary, predictable paragraph structure, lack of nuance.
- Statistical watermark: A mathematical signal injected into the choice of words by the AI provider.
- Metadata: Information hidden in the file or data stream attesting to the source.
| Trace Type | Nature | Detection Mode |
|---|---|---|
| Typographic | Visible | Human reading / Regex |
| Unicode | Invisible | Code analysis / Script |
| Statistical | Mathematical | Probabilistic detectors |
Each of these levels requires a specific response. Cleaning special characters will not change a stylistic signature that is too prominent. Conversely, deep rewriting will erase the style without necessarily correcting invisible character errors inherited from the generation.
Confusing these levels prevents the implementation of effective quality control.
03
How Does a Real Textual Watermark Work?
Unlike an image where a transparent logo is applied, a textual watermark is a statistical anomaly invisible to the naked eye. A Large Language Model (LLM) works by calculating the probability of the next word. For a sentence like "Artificial intelligence deeply transforms the...", the model assigns scores: marketing (32%), workplace (24%), world (12%).
The watermarking mechanism intervenes by discreetly favoring certain words over others, according to a mathematical rule known only to the provider. In a single sentence, the change is undetectable. In a text of several hundred words, a detector will be able to spot that the frequency of certain terms is statistically abnormal.
The statistical watermark does not depend on the form of the text, but on the probability distribution during its creation. It is an imprint embedded in the very choice of vocabulary.
04
Why Cleaning Characters Is Not Enough
It is tempting to think that by removing emojis and normalizing spaces, the text becomes "human." This is a mistake. Technical normalization makes the text clean for your computer systems (CMS, PIM), but it in no way modifies the deep structure of the information generated by the machine.
Three fundamental operations must be separated:
- Cleaning: Correction of Unicode artifacts and typography.
- Humanization: Adjustment of tone, voice, and editorial style.
- Neutralization: Modification of the statistical distribution to remove watermarks.
An automatic cleaning tool prevents your databases from being polluted by parasitic characters. It is an essential technical health step, but it is distinct from writing or revision work.
Technical cleanliness ensures compatibility, not editorial quality.
05
The Solution: A Real AI Post-Production Chain
To scale up, the challenge is no longer generation, but Quality Assurance (QA). An industrial production chain must integrate automatic control steps before any publication. The goal is to ensure that the content respects both machine constraints and brand identity.
- Unicode Normalization — Automatic removal of invisible characters and parasitic homoglyphs.
- Typographic Normalization — Forced alignment with the brand's punctuation and formatting rules.
- Editorial Rewriting — Processing through a second AI agent responsible for checking tone and eliminating repetitions.
- Compliance Check — Final verification of links, lengths, and consistency of product data.
This approach allows for managing 10,000 product descriptions with the same rigor as a hand-written article. By industrializing control, you transform raw and risky production into a reliable and high-performing digital asset.
The future of AI in business lies not in the prompt, but in mastering the governance of the generated flows.
Written by

Jean-Baptiste Duquesne
Partner — SEO, GEO & CRM
A web pioneer since 1995 and founder of 750g.com (sold to Webedia). At Good Morning AI he leads SEO, visibility inside generative engines (GEO) and customer lifecycle work.
Published on 12 September 2026 · Reviewed and updated on 12 September 2026
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