Install

Gemini website or Gemini app

Last verified 27 August 2026.

The easiest reusable method is a custom Gem. Create it once on the Gemini website, then use it from the website, mobile app, or supported Google Workspace side panel. Paste in the instructions file from Get Clean Language.

1. On a computer, open gemini.google.com.
2. Open the menu on the left, then click Gems. If you do not see it, click Settings and help, then Gems.
3. Click New Gem.
4. Name it Clean Language. For the description, you can use: Applies the Clean Language writing standard so responses are precise, direct, and natural.
5. Open cleanlanguage.md, copy all of it, and paste it into the Instructions box.
6. Set no default tool.
7. Click Save.

You can also add cleanlanguage.md as Gem knowledge: under Knowledge, click Add files, then Upload files, and select it. Pasting the instructions has given better responses than uploading alone, which Gemini sometimes ignores, so paste is the primary method. Using both together is an option.

To use it later, open Gemini, click Gems, then click Clean Language.

Test it, or choose your spelling.

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