Update

How to update a dictionary

Work in progress...

1. Click on check for updates
2. Click on the ! mark next to any dictionary that has an update
3. Click on update

Add a picture here, don't think yomitan covers it.

This should fetch the dictionary for a future release.

Explain this quote from here:

Be aware that non-English dictionaries generally contain fewer entries than their English counterparts. Even if your primary language is not English, you may consider also importing the English version for better coverage.

How updating works internally

A comprehensive guide about making yomitan dictionaries can be found here.

Updating is done via the dictionary index (schema), and more precisely, via these four attributes:

1. revision: the sematic or calendar version of the dictionary. We use calendar for all dictionaries.
2. isUpdatable: set to true, makes the dictionary updatable.
3. indexUrl: points to an unzipped copy of the new dictionary index.
4. downloadUrl: points to a zipped version of the new dictionary.

When clicking Check for Updates, the yomitan code compares the revision of the current, imported dictionary, with the one in the unzipped index at indexUrl. If the revision found in the latter is more recent, it downloads from downloadUrl the new dictionary and replaces the old version.

Example:

{
  "revision": "2026.02.22",
  "isUpdatable": true,
  "indexUrl": "https://some/website/wty-el-el-index.json",
  "downloadUrl": "https://some/website/wty-el-el.zip",
  ...
}