Exception: please specify a MediaWiki or custom i18n message!
Available doc translations 
EnglishThe {{i18n}} template is used to localize common strings by key similarly to the magic word {{int:}}.
This is a necessary template for the Valve Developer Community since site administrators have yet to add Extension:Translate for i18n support.
This seeks to deprecate the unmaintainable and sub-optimal localization stack built on Template:Autolang, Template:Uselangflags, and Template:Uselang.
It should be used for localizing small phrases of text and not for full-page translation (e.g., see Template:Doc, Template:Dictionary).
Localizations are automatically transcluded based on the user’s {{PAGELANGUAGE}}.
If a localization is non-existent, then a link to the hypothetical page is returned.
This template is technically a wrapper for {{int:}} and will behave identically for MediaWiki messages.
Otherwise, it will emit the localizations for a given custom localization key.
Custom localization keys are stored as sub-pages to {{i18n}}.
Each sub-page of a localization key is named after a valid MediaWiki language code and stores the raw translation of its localization key.
For example, the localization key sandbox could have the sub-pages en and ja whose contents are Sandbox and サンドボックス, respectively.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Localization Key | 1
|
The localization key to substitute a translation for. | String | required |
{{User:結衣/Template:Int}} is an invalid state: Exception: please specify a MediaWiki or custom i18n message!{{User:結衣/Template:Int|mainpage}} yields: Main Page{{User:結衣/Template:Int|blahblahblah}} requests an non-existent localization key: Warning: undefined localization key! Check if the key is misspelled or create the localization key blahblahblah.