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An **interwikimedia link** is a link from a Wikimedia Foundation-supported project to another one (e.g., from Wikipedia to Wiktionary).

## Prefix codes to link to Wikimedia sister projects

### Note on linking to foreign-language Wikiprojects

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Inline links to foreign-language Wikiprojects can be made by adding the language code as a prefix:

* To link to a Wikipedia article in a particular language inline (as opposed to the links in the sidebar), use `[[:language code:Title]]`.
* To link to a page on a different project in a particular language, expand the above syntax with a code for the project from the table below in § Codes for linking to projects, as in `[[:project:language code:Title]]` or `[[:language code:project:Title]]`.

For example, `[[:s:de:Salz]]` or `[[:de:s:Salz]]` will link to the Salz page on the German-language Wikisource, `[[:wikt:fr:sel]]` or `[[:fr:wikt:sel]]` to the sel page on the French-language Wiktionary, etc. See § Doubling prefixes for more tips and examples, plus information on doubling with the `category` prefix.
For language codes, see List of Wikipedias. Remember to put a colon in front of a link starting with a language code prefix, or the saved edit will not show it at all; however, the colon is optional if the link starts with the project code prefix and then has the language code prefix.

### Prefix codes for linking to projects

Unless a language code is added, as discussed above and in § Doubling prefixes, the following interwikimedia prefix codes link to the Wikiprojects in English.

Note that some links don't work as expected within the same project, e.g., meta:Test on Meta itself would mean m:Meta:Test, a different page. Outside of Wikimedia sister projects, only metawikipedia:Test might work for m:Test.

### Special versions of Wikipedia

Note that the section above includes two special versions of Wikipedia, nostalgia and test. Nostalgia is a static copy of Wikipedia, as it was in 2001, and can be linked to by using `[[nost:]]`. Test is a version of Wikipedia for edit and software testing and can be linked to by using `[[testWiki:]]`.

## Tips for using interproject and interlanguage links

### Hiding the visible prefix

To suppress the first, visible prefix in the saved page, use the pipe trick:

### Doubling prefixes

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As demonstrated in the examples below, combining certain prefixes allow them to be combined, thus enabling direct page links that are not possible with a single prefix. For example, one can link a word in the English Wikipedia to a term in the German Wiktionary, or [[link to a category in the Commons.

When using language codes, the order of the prefixes does not matter. Remember to put a colon in front of a link starting with a language prefix; however, the colon is optional if the link starts with the project code prefix and then has the language prefix. See the last two examples in the table below.

When using the category prefix, the order of the prefixes *does* matter. The order must be `[[project:category:category-name]]`. Starting with a colon and the prefix `category` links to categories on this Wikipedia, creating a red link if the category doesn't exist. Without the colon but starting with the prefix `category`, nothing appears in the saved page.

### Examples of link combinations

`[[:en:Main Page]]
[[:de:Hauptseite]]`

## Linking to international chapters of Wikimedia

Note that these shortcuts *do not* link to the versions of Wikipedia (or to other reader-focused, information-delivering projects such as Wiktionary) in languages other than English, but instead to link to the localized equivalent of http://www.wikimedia.com (that is, modified for the local language, country or culture).

## See also

* Wikipedia:Glossary
* Wikipedia:Wikimedia sister projects, guideline for using Wikipedia's sister projects
* Wikipedia:Template messages/Sister projects, templates for linking between the various Wikimedia sister projects
* Help:Interlanguage links, describes how to link between differing foreign language Wikipedias
* Help:Contents/Links, table of contents for help pages about links and references
* Help:Interwiki linking, more help to link to other projects
* mw:Help:Interwiki linking, help page from MediaWiki
* Meta-Wiki content:
	+ m:Help:Interwiki linking
	+ m:Interwiki map, list of WMF and non-WMF mappings
* commons:Commons:First steps/Reuse, instructions on linking a file from Commons to Wikipedia

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