Template:Lang links/doc
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This template shows which language versions of a page exist (based on the naming scheme ../xx, with xx the language code), and provides links to them. For example:
{{lang links|Template:Creator}} → English
This should not be used in really heavily used templates to avoid hitting the "expensive parser function" limit on pages with other expensive templates. If the template/page is not transcluded much or it's used in cases where it's the only template on a page, then the parser function calls shouldn't be an issue. See also the substituted versions Template:Ll and Template:Lle of this template.
Compare:
{{Special:PrefixIndex/Template:Creator/}} →
which does not distinguish between a postfix for a language and other postfixes such as /doc and /layout. Also it takes more space, and the order and format of the result cannot be changed.