编辑“︁模板:Lang/doc”︁（章节）

== Rationale ==

{{section link|Wikipedia:Manual of Style/Text formatting|Foreign terms}} requires the use of {{tl|lang}} instead of manual <nowiki>''italics''</nowiki>. This is preferred for the following reasons:

* [[Web browser]]s can use the information in such [[:Category:Wikipedia multilingual support templates|multilingual support templates]] to choose an appropriate font.
** This is great for [[CJK characters|CJK]] where a character can be given its language-specific shape but will fall back to another form if no appropriate font is found or if the preferred font lacks that character, for example because the language does not make use of that character: see {{section link|Han unification|Examples of language-dependent glyphs}} and [[User:Wikipeditor/CJK|these comparison tables with a screenshot]].
* For [[web accessibility|accessibility]] – [[screen reader]]s need language info to speak text in the correct language – and to satisfy [[Wikipedia:Accessibility#Text|Wikipedia accessibility guidelines]].<ref>{{cite web |url=https://developer.yahoo.com/blogs/ydn/yahoo-search-results-now-natural-language-support-7318.html|title=Yahoo! search results now with natural language support |date=13 Mar 2008|first=Chris |last=Heilmann|work=[[Yahoo! Developer Network]] Blog |accessdate=28 Feb 2015|archiveurl=https://web.archive.org/web/20090125024422/http://developer.yahoo.net/blog/archives/2008/03/yahoo_search_re.html|archivedate=25 Jan 2009|url-status=dead}}</ref>
* For [[spell checker]]s and grammar checkers, to match the text to the dictionary and syntax of the correct language.
* To prevent the page from showing up on the [[Wikipedia:Typo Team/moss/not English]] report, which flags articles needing translation.
* To help browsers choose appropriate [[quotation mark]]s,<ref name="qa-lang-why">{{cite web|url=http://www.w3.org/International/questions/qa-lang-why |title=Why use the language attribute?|date=18 November 2014|first= Richard |last= Ishida | publisher=World Wide Web Consortium |issue=Previously by Deborah Cawkwell, BBC World Service|accessdate=1 Mar 2015}}</ref> and make decisions about [[Hyphen|hyphenation]],<ref name="qa-lang-why"/> [[orthographic ligature|ligature]]s,<ref>{{cite web|url=http://www.w3.org/TR/css3-fonts/#font-variant-ligatures-prop|title=6.4 Ligatures: the font-variant-ligatures property|work=CSS Fonts Module Level 3 W3C Candidate Recommendation 3 October 2013}}</ref> and spacing.<ref name="qa-lang-why"/>
* Users can apply styles to languages in their [[style sheet (web development)|style sheet]]s (useful for editors).
* [[Web search engine|Search engine]]s can use this information when [[search engine indexing|indexing]] text.
* Facilitates better data-scraping, parsing and reuse.
* Useful for application developers who re-publish Wikipedia (also see {{section link|Wikipedia:Manual of Style/Accessibility|Other languages}}).
* Useful for research or compiling statistics about language use in Wikipedia.