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Explainer video with an AI avatar in multiple languages

Level: IntermediateDuration: Half a daySteps: 4

In short

For an explainer video with a talking AI avatar you need neither camera nor studio. You write a clear script with ChatGPT, have an avatar speak the script in a tool like HeyGen or Synthesia, optionally generate a natural voice and edit the result. This creates professional explainer videos, even in several languages.

The biggest advantage of AI avatars is scalability: written once, the same explainer video can be output in many languages without reshooting. What matters for a good result isn't the perfect avatar but a clear script and natural delivery. Plan your first attempt as a test – once your workflow is set, you produce further videos in a fraction of the time.

Tools you need
ChatGPTSynthesiaElevenLabsDescript

Step by step

  1. 1ChatGPT Open tool

    Create a clear, well-structured script for the explainer video.

    A good script is half the battle. Write in short, spoken sentences and build a clear structure (problem, solution, next step), because the avatar reads exactly what you give it.

    Example prompt

    Write a script for a [length] explainer video on the topic [topic] for [audience]. Clear language, clear structure (intro, 3 key points, summary), a call-to-action at the end.

  2. 2Synthesia Open tool

    Generate an avatar video in over 140 languages from the script.

    Watch for a calm, natural speaking pace in the avatar video. Better to regenerate a paragraph than publish a rushed or unnaturally stressed video.

    Example prompt

    Create an explainer video with a [professional/friendly] avatar from this script, language [language(s)], with matching subtitles: "[paste script]"

  3. 3ElevenLabsAd Open tool

    Alternatively, generate or clone your own natural narration voice.

    Your own or a cloned voice feels more personal than a stock voice. Check the result for mispronounced technical terms before you take it into the video.

    Example prompt

    Generate a natural narration voice for my explainer video, [calm/friendly], medium pace, clear pronunciation: "[paste script]"

  4. 4Descript Open tool

    Do the final polish, editing and adjustments on the finished video.

    When fine-tuning, you remove pauses and stumbles and ensure a clean rhythm. Captions raise reach because many videos are watched without sound.

    Example prompt

    Trim the video to the key statements, remove pauses and add text overlays for [key points] at the most important spots.

Tips & common mistakes

  • Most common mistake: a script that's too long. Keep explainer videos short and focused on one core message.
  • Write the way you speak – written nested sentences sound stiff from an avatar's mouth.
  • Check the pronunciation of technical terms and proper names before finalizing the video.
  • Use multilingual output deliberately: one production, several language versions, more reach.

Frequently asked questions

Don't AI avatars look artificial?

The quality has risen sharply in recent years and is usually perfectly fine for explainer and training videos. A good script and natural intonation matter more than perfect lip movements.

Can I create the same video in several languages?

Yes, that's one of the biggest strengths: many tools translate script and voice so you can output the same video multilingually.

Do I need my own voice?

No, the tools provide voices. You can also clone your own voice if you want a more personal impression.

Don't AI avatars look artificial?

Quality has risen sharply in recent years and is usually fine for explainer and training videos. A good script and natural delivery matter more than perfect lip movements.

Can I create the same video in several languages?

Yes, that's one of the biggest strengths: many tools translate script and voice, so you can output the same video in multiple languages – without a new shoot.

Do I need my own voice?

No, the tools come with voices. But you can clone your own voice if you want a more personal impression.

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Updated: June 2026