JSON dialect used by i18next, one of the most popular libraries to localize js applications.

File Extensions .json
API Extension i18next
Format Options No
Import Yes
Export Yes
Pluralization supported? Yes
Descriptions supported? No


  "boolean_key": "--- true\n",
  "empty_string_translation": "",
  "key_with_description": "Check it out! This key has a description! (At least in some formats)",
  "key_with_line-break": "This translations contains\na line-break.",
  "nested": {
    "deeply": {
      "key": "Wow, this key is nested even deeper."
    "key": "This key is nested inside a namespace."
  "null_translation": "",
  "sample_collection": [
    "first item",
    "second item",
    "third item"
  "simple_key": "Just a simple key with a simple message.",
  "unverified_key": "This translation is not yet verified and waits for it. (In some formats we also export this status)",
  "pluralized_key": "Only one pluralization found.",
  "pluralized_key_plural": "Wow, you have %s pluralizations!"

What is supported?


i18next offers a lot of functionality. We fully support

  • Pluralizations
  • Namespaces
  • Arrays

What is not supported?


Interval Pluralizations are persisted as normal key values. There is no support in the UI.

Nesting / Variable replacement is not supported directly. However placeholders can be activated. We currently do not support cross-referencing keys from within values. There is no support in the UI.

Further Reading