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Due to technical restrictions, some page names are not allowed on Wiktionary. Since Wiktionary uses the term being defined as the page name, there are thus some terms that cannot have their own entry. Some of these are collected here instead. (For more information on the technical restrictions, which are in the software that Wiktionary runs on, see the MediaWiki Handbook.)

When adding new entries with unsupported titles, update MediaWiki:Gadget-UnsupportedTitles.json and Module:unsupported titles/data (the backend for Template:unsupported).

Index

See here for a complete list.

Unsupported symbols

The following characters cannot be used at all in page titles: # < > [ ] { } | �

Restrictions may apply to other characters:

  • Titles cannot start with a colon.
  • Relative path page titles (such as "/." or "./.") are invalid.
  • Spaces and underscores are treated equally. Leading and trailing spaces/underscores are removed. Consecutive spaces and underscores between non-whitespace characters are reduced to one. Page titles consisting of only spaces or underscores are invalid as empty. Underscores can be displayed in page titles in place of spaces with the DISPLAYTITLE magic word.
  • The tilde (~) is allowed, but page titles cannot contain three or more consecutive tildes.
  • A title may contain the character %, unless it is followed by two hexadecimal digits.
  • While the semicolon is a valid character, most page titles ending with a semicolon formerly were normally inaccessible due to a software bug; this was tracked in Phabricator and resolved. However, page titles still cannot contain HTML reference characters ending in a semicolon.
. ..    ./.    о/.
: : :    ::    :(    :)    :-    :-(    :-)    :|   :/    :-/    :3    :=    :D    :-D    :d    :o    :P    :-P    :p    :-p    :{    :-{       :-Þ       :-þ    :≠
; &amp;
| -||-    :|    C|N>K    | |
_ (^_^)    *_*    -_-    9_9    >_<    ^_^    _ _    ¯_(ツ)_/¯    ¯\_(ツ)_/¯    ┬─┬ノ( º _ ºノ)    O_O    O_o    o_O    o_o    snake_case    T_T    X_X    x_x    x86_64    ×_×    ಠ_ಠ    ಥ_ಥ
# # #    #MeToo    #MeToos    #MeTooing    #MeTooed    C#    eq #    f##k    f##ked    f##king    f##ks    hr #
<    >
< />    < >    < > </ >    <!-- -->    <>    C|N>K
->    <-    <=    =<    =>    >=
</3    <3    <g>    </s>    >_<    >:(    >:)    >:[    >:]
[    ] [ ]    […]    [-0-]    [-o-]    [citation needed]
{    } { }    :{    :-{
] [ (space) ][ (space in Ogham)

Unsupported length

No page title may be longer than 255 bytes (not characters) in UTF-8 encoding.

Unsupported prefix

Titles can't have a prefix (letters before a colon) that is a language code, a project code, or a namespace prefix (which would place it in the wrong namespace), including aliases. Prefixes are not case-sensitive.

Characters not in Unicode

  • (cifrão)
  • (old Israeli shekel)
  • (pansexual)
  • (church ruins)
  • (capital form of the letter λ)
  • (capital form of the letter ƛ)
  • (capital form of the letter ƛ̓)
  • (capital casing form of the letter ʕ)
  • (lowercase casing form of the letter ʕ)
  • (linearized tilde)

Long words

This is a list of notable long words which were formed systematically, or which are mentioned in authoritative sources, but which do not yet meet Wiktionary's Criteria for Inclusion.

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