How To Customize 404 Page As Hugo Theme

Hugo supplies a method to create a fully customizable 404 page using its internal feature. That also means that Bissetii has such support for creating a fully customized 404 inheritly page as well.

This feature is available since v1.11.0.

Known Limitation

It is not Hugo’s duty to serve 404.html but the reverse proxy/front-end facing server. These are the known limitations:

  1. Hugo generates multi-languages 404.html in each language directories. However, on common platform like Github or Gitlab, they only recognizes a single 404.html at root directory only.
  2. Hugo has no way to auto-select a specific language’s 404.html as the root 404.html.

Enable Custom 404

By default, Bissetii workrounds these limitations using the script. To enable a fully functional 404.html page, you need to perform the following steps.

This function is only available for v1.7.0 script and above.

Language Selection

The manager automatically reads the first language code tag from your local engine’s languages.toml configuration file as its selection choice. The pathing is:


If you need to select a specific language, place the language configurations as the first choice. Example, to select zh-cn’s 404.html over en-us, the languages.toml should have [zh-cn] comes first:

languageCode = "zh-cn"
languageName = "Chinese (Simplified)"
contentDir = "../docs/zh-cn"
title = "Bissetii"

languageCode = "en-us"
languageName = "English"
contentDir = "../docs/en-us"
title = "Bissetii"

Customizing 404 Page

The location of the 404 page is located at:


You should only supply main code blocks will do. The rest would follow Bissetii’s templates. Due to the limitations introduced by Hugo above, it’s better to be very creative with the design without locking yourself to a specific language.


That’s all for rendering custom 404.html page.