---
title: extra-key
description: "A key is not in the source."
---

# `extra-key`

**Warning** · A key is not in the source.

`git8n check` reports this rule as a warning. It fails only past `--max-warnings`.

## Why it matters

The application never asks for the key. It is often a key that the source renamed or deleted, and its translation is lost work.

## Invalid

`locales/en/common.json`

```json
{
  "title": "Hello"
}
```

`locales/fr/common.json`

```json
{
  "title": "Bonjour",
  "welcome": "Bienvenue"
}
```

```text
$ git8n check --source en
locales/fr/common.json
  warning  common:welcome is not in en.  extra-key

Read more:
  extra-key  https://git8n.sakuga.dev/docs/reference/rules/extra-key.html

0 errors, 1 warning in 2 files (en → fr, 1 key).
```

## Valid

`locales/en/common.json`

```json
{
  "title": "Hello"
}
```

`locales/fr/common.json`

```json
{
  "title": "Bonjour"
}
```

```text
$ git8n check --source en
0 errors, 0 warnings in 2 files (en → fr, 1 key).
```

## What to do

Delete the key, or move its text to the new key of the source. A plural form that the language does not need is an extra key too.

[All the rules](./index.md) · [The command `check`](../cli.md#check)