(In reply to MarjaE from comment #7) > Here's one: http://www.digitalattic.org/home/war/vegetius/ > > View Page Info shows content-language English. This page ends up with the Other Writing Systems font preference because it does not have a `lang=en` (or equivalent) attribute. Here's the beginning of the document, from View Source: ``` <!-- HEADER --> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <head> <title>The Military Institutions of the Romans (De Re Militari)</title> <meta http-equiv="content-Type" content="text/html;charset=utf-8"> <meta http-equiv="content-Language" content="English"> <meta name="author" content="Mads Brevik"> <meta name="Robots" content="all"> <meta name="description" content="'De Re Militari' by Flavius Vegetius Renatus"> <meta name="keywords" content="flavius vegetius renatus, de re militari"> <link href="/favicon.ico" rel="shortcut icon"> <link href="/home/_include/attic.css" type="text/css" rel="stylesheet"> </head> <!-- BODY --> <body> <div class="Body"> <div id="Mainmenu"> <div class="MainTitle"> <a href="/" style="color: black">Digital Attic</a> </div> <div class="TopMenuLink"> <a href="/home/read/asoiaf/">A Song of Ice and Fire</a> : <a href="/home/war/">Warfare</a> </div> </div>``` Note the absence of any `lang` attribute. What Page Info shows (content-Language: English) is not a language tag (`lang` attribute) but a `meta` tag, which (despite its name) is not the correct way to declare the language of the document itself; see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Language; its purpose is slightly different. In addition, even if this *were* the relevant place to declare the document language, it wouldn't work as intended because it literally says "English" as the value (which Page Info dutifully shows); but the value is supposed to be a formally-defined language *tag* such as "en-US" that can be parsed in a well-defined way for processing. The string "English" is not a defined language tag and so would be ignored anyway. So to sum up: the page does not declare its document language because of two authoring errors: trying to use an arbitrary language *name* rather than a well-formed language *tag*, and putting it in the `http-equiv="content-Language"` meta tag rather than as an HTML `lang` attribute. As a result, Firefox ends up using the Other Writing Systems font preference to resolve `sans-serif` for this content.
Bug 1643536 Comment 9 Edit History
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(In reply to MarjaE from comment #7) > Here's one: http://www.digitalattic.org/home/war/vegetius/ > > View Page Info shows content-language English. This page ends up with the Other Writing Systems font preference because it does not have a `lang=en` (or equivalent) attribute. Here's the beginning of the document, from View Source: ``` <!-- HEADER --> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <head> <title>The Military Institutions of the Romans (De Re Militari)</title> <meta http-equiv="content-Type" content="text/html;charset=utf-8"> <meta http-equiv="content-Language" content="English"> <meta name="author" content="Mads Brevik"> <meta name="Robots" content="all"> <meta name="description" content="'De Re Militari' by Flavius Vegetius Renatus"> <meta name="keywords" content="flavius vegetius renatus, de re militari"> <link href="/favicon.ico" rel="shortcut icon"> <link href="/home/_include/attic.css" type="text/css" rel="stylesheet"> </head> <!-- BODY --> <body> <div class="Body"> <div id="Mainmenu"> <div class="MainTitle"> <a href="/" style="color: black">Digital Attic</a> </div> <div class="TopMenuLink"> <a href="/home/read/asoiaf/">A Song of Ice and Fire</a> : <a href="/home/war/">Warfare</a> </div> </div> ``` Note the absence of any `lang` attribute. What Page Info shows (content-Language: English) is not a language tag (`lang` attribute) but a `meta` tag, which (despite its name) is not the correct way to declare the language of the document itself; see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Language; its purpose is slightly different. In addition, even if this *were* the relevant place to declare the document language, it wouldn't work as intended because it literally says "English" as the value (which Page Info dutifully shows); but the value is supposed to be a formally-defined language *tag* such as "en-US" that can be parsed in a well-defined way for processing. The string "English" is not a defined language tag and so would be ignored anyway. So to sum up: the page does not declare its document language because of two authoring errors: trying to use an arbitrary language *name* rather than a well-formed language *tag*, and putting it in the `http-equiv="content-Language"` meta tag rather than as an HTML `lang` attribute. As a result, Firefox ends up using the Other Writing Systems font preference to resolve `sans-serif` for this content.