Your AI Translation Assistant

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slAItor combines recent advances in AI with more standard machine translation techniques. A new kind of system that does much more than just translating.


slAItor can explain a translation step-by-step and with details. You can use this unique functionality to learn or improve your understanding of a language.

Spot and explain errors

Thanks to the editor mode, you can provide your own translations to slAItor: It will spot, explain, and correct the errors.


slAItor's paraphraser and style calibrator are powerful tools that can adapt the translations to numerous contexts.


slAItor uses the most recent advances in artificial intelligence and translation technologies. Our translation engine is currently in the last phase of its development. We are continuously evaluating slAItor with native speakers for each supported languages and apply a rigorous scientific methodology to validate our progress.

The remaining tasks to complete until the first release are as follows:

  • Further optimize the algorithms
  • Finalize the user interface
  • Continue beta-testing the quality of slAItor's responses
  • Assistant in other languages: slAItor explains the translation in the language of your choice. Example: A translation from Japanese to English explained in French. Note: This feature is still under development, it may not be available at launch.

At launch, slAItor will support the following 8 languages: English, French, Spanish, German, Italian, Portuguese, Chinese, and Japanese. We are also studying the integration of Dutch, Arabic, Korean, and Hindi for the following months.

We expect translations into English to be much better supported than translations into the other languages, especially when generating translation with detailed step-by-step. We won't restrain the translation directions. You will be free to judge the quality by yourself but we will put a tag to warn you that the translation quality may be low for some translation directions. We are constantly working to improve translation quality.

AI + translation technologies = slAItor

We combined the recent advances in AI and large language models with state-of-the-art translation technologies.

  • slAItor prepares your query to make it easy to process by the AI engine. It includes some normalization, tokenization, and splitting of your text. Then, everything is packed into a "prompt" to be sent to the AI engine. This step relies on several open source project such as preprocess, sacremoses, and Pytorch.

  • For now, slAItor mainly exploits models from the GPT family by OpenAI. We keep exploring alternatives, including the development of our own model.

  • This step checks and formats the answer. We use again several open source projects.

  • We continuously monitor slAItor's performance using in-house evaluation datasets as well as public benchmarks. We rely on a state-of-the-art automatic evaluation metric, COMET, and human evaluators.

More Features

slAItor integrates many features to make it easy to use on most devices, for casual and professional users.

Switch to editor mode

slAItor has an editor mode that transforms the interface to allow you to enter your own translation and then suggests you corrections or improvements.

Stop and regenerate

The on-the-fly generation by slAItor can take some time to complete, especially in the step-by-step mode. It can be interrupted at anytime, for instance if you made an error in your text to translate. Then just click on regenerate to take your correction into account.

Fully responsive user interface

You can use slAItor on any devices: your phone, tablet, computer, ... The inferface adapts to the size of your screen.

Tap and paste

On your phone, tap the translation or just click on it to copy it in your clipboard. Then paste it anywhere you want: email, Twitter, Facebook, ...

Translation history
(coming soon)

You can save in your account as many translations as you would like. slAItor's interface helps you to search and edit your translation memory.

Import/export documents
(coming soon)

slAItor can translate docs, spreadsheets, TXT, and TMX files. It will give you an estimation of the cost before the translation. You can also export in the same file formats your translations and download them.


Pre-order offer: 50% discount

Only 100 seats available before launch

Order now and start to use slAItor as soon as it launches!
The public launch is scheduled for the beginning of June 2023. Your subscription will only start the day we launch, and is 100% refundable before that.
If, for any reasons, slAItor can't be launched, you will be fully refunded.



  • 5,000 Credits
    (enough to translate 5,000,000 characters)
  • 1-year license
  • Editor mode
  • Commercial use allowed
  • Dedicated customer support
  • Early-access to new features, languages, and styles



  • 10,000 Credits
    (enough to translate 10,000,000 characters)
  • 1-year license
  • Editor mode
  • Commercial use allowed
  • Dedicated customer support
  • Early-access to new features, languages, and styles

Frequently Asked Questions

  • We target the beginning of June 2023.

  • Yes. You can already buy a Casual or a Pro plan with a 50% discount. Once we launch, we will contact you by email to deliver your login information and then you will be able to start using slAItor. If, for any reasons, we can't launch slAItor, you will be fully refunded.

  • "credit" is the unit slAItor uses to simplify the evaluation of the translation cost.

    You can send text to slAItor containing a maximum of 2,000 characters (we will extend it to 10,000 in the following months). If you want to translate multiple sentences or lines, try to pack as many as possible into one query to reduce the costs.

    The cost in credits is automatically computed given the length of your texts and the options you selected.

    Translating 1,000 characters costs 1 credits. This costs is tripled to 3 credits for the step-by-step translations and in the editor mode. The minimum cost of a query is 0.1 credit.

    For example, with our Casual plan, you can translate up to 5,000,000 characters.

    Credits are automatically debited from your account as soon as your press "translate" (or "Check" in the editor mode).

    If you need more credits, we also propose packs of credits that you can buy separately at anytime.

    With our Casual plan, you can buy 1,000 credits for $6, enough to translate 1,000,000 characters, making slAItor one of the most inexpensive translation engine on the market.

  • We can tell you that it is a mix between standard machine translation technologies and state-of-the-art large language models from the GPT family.

    The use of a large language models at the core of slAItor is the main reason why our costs are lower than other online translation systems.

  • Benjamin Marie.

    Benjamin holds a Ph.D in machine translation. He has 10+ years experience in machine translation research and development.

    Google scholar blog

  • Yes. We will maintain slAItor at the state of the art.

    Major upgrades will be deployed at no additional cost, but we will deploy them slightly faster for members who opted for a Pro plan.

  • Yes. We are working very hard to support around 50 languages by the end of 2023.

  • No. When using slAItor you may not notice it, but our internal evaluation shows that the translation quality is slightly worse than well-established translation systems.

    slAItor is cheaper and propose several features that other online systems don't have.

  • No. Words generated by slaitor will appear one by one. Our current estimation is that it may take up to 1 second per 20 words.

    We are working on a more realistic demo.

  • No. We don't use your data to develop or improve slAItor and its models.

    All your interactions with slAItor are saved for 30 days. This is only for bug tracking and better answering your potential reclamations. If you would like to remove your data from our server, contact us.

  • Yes. This is non-reversible. All your data are immediately deleted.

  • Yes. If you opt for the Pro plan, we grant you an unlimited license that doesn't expire and grant you the full property of slAItor outputs, including for a commercial use.

  • Yes. We answer your questions as fast as we can. If you opted for the Pro plan, we answer your questions within 24h, or 48h if received on weekend or holidays.

  • Yes, but only for a higher plan. You would only have to pay for the difference between your current plan and the new plan. Contact us if you want to change of plan.