Understanding Html Lang Codes

Html lang codes are used to specify the language of the content in an HTML document.

They can be used for search engine optimization (SEO) to help search engines understand the content and provide more accurate results.

Html lang codes are typically placed in the HTML tag.

The lang attribute is a global attribute that can be used on most HTML elements.

Html lang codes are used to specify the language of the content, not the user's interface language.

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ISO language codes exist, and they have corresponding codes from Microsoft and Macintosh.

These codes are used to identify languages in the context of HTML. A language code should be interpreted as a hierarchy of tokens rather than a single token.

Language codes can be quite specific, like "en-US" for English in the United States. User agents should favor exact matches when adjusting rendering according to language information.

However, if an exact match isn't available, user agents should consider matching primary codes to be sufficient.

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You can set the default page language for HTML pages by adding the lang="en-US" attribute to the HTML tag.

The lang attribute uses a primary code to indicate the language of a web page, and it's essential to choose a valid language code from the standard list of language codes as found in ISO-639.

To choose a primary language code, keep the lang attribute value as short as possible and use the two-letter code whenever possible. Only use a three-letter code if no two-letter code is available.

The lang attribute value should be in the format of a primary code followed by an optional subcode, separated by a hyphen. For example, "en-US" for United States' English and "es-MX" for Mexican Spanish.

Don't forget to use a hyphen, not an underscore, and do not include any spaces in the lang attribute value.

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WCAG Success Criterion 3.1.1 requires that a page language is specified in a way which may be 'programmatically determined' via the lang attribute. This is crucial for assistive technologies like screen readers to invoke the correct pronunciation.

Assistive technologies need to know how to correctly pronounce text, and language markup is especially relevant at IU, since the university has a large international audience. If the language of content is not specified, assistive technology will read the text in the language set in the visitor's operating system.

The lang attribute specifies the language of element content and attribute values, which helps user agents render content more meaningfully based on accepted cultural practice for a given language. This doesn't imply that user agents should render characters that are atypical for a particular language in less meaningful ways.

For HTML pages, the HTML lang attribute should be used to set both the default language and to indicate any language changes in the text. For XHTML pages, use the xml:lang attribute.

Here are some situations where author-supplied language information may be helpful:

Declaring a language for your content is critical for users with disabilities, and it's also helpful for users from non-English-speaking countries who may have difficulty understanding the page content if it's not specified.

Language codes are used to identify the language of a web page or content, and it's essential to use them correctly to ensure accessibility and user experience.

WCAG 2.1 SC 3.1.1 (Level A) requires that the default human language of each web page can be programmatically determined. This means that the language code should be set for the HTML element, so user agents can understand the language of the content.

The ISO language code "ar" is used for Arabic, and it has variants that can be used for specific dialects or regions.

The ISO language code "zh" is used for Chinese, and it has variants that can be used for specific dialects or regions. For example, "zh-Hans" is used for Simplified Chinese, and "zh-Hant" is used for Traditional Chinese.

The hierarchy of language codes is important to understand, as it determines how user agents interpret the language information. According to the guidelines, a user agent should always favor an exact match, but should also consider matching primary codes to be sufficient.

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Here are some examples of non-Western European languages and their corresponding ISO language codes:

The ISO language code "en-US" is used for American English, and it's an example of a language code that has a primary code "en" for English.

WCAG Success Criterion 3.1.1 requires that a page language is specified in a way which may be 'programmatically determined' via the lang attribute.

This is crucial for assistive technologies like screen readers to invoke the correct pronunciation.

WCAG Success Criterion 3.1.2 requires that pages with parts in different languages have the languages of those parts specified too, using the lang attribute.

The purpose of these requirements is to ensure that assistive technologies can correctly pronounce different languages.

The lang attribute is the correct mechanism for specifying languages, as seen on the language menu on MDN, which includes a lang attribute for each entry.

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When working with HTML lang codes, there are a few special cases and considerations to keep in mind.

For languages that don't have a standardized language code, you can use the language code for a closely related language. For example, if you're writing about the language of the Inuktitut people, you can use the language code for English, "en", as a fallback.

Some languages have multiple language codes, such as English, which can be represented by "en", "en-US", or "en-CA", depending on the region.

The language code should be placed in the HTML tag, which is used to declare the language of the document. This tag is placed in the head section of the HTML document.

If you're using a language that has a non-Latin script, such as Arabic or Chinese, you'll need to specify the language code and also the direction of the text. This is done using the dir attribute in the HTML tag.

The language code should be consistent throughout the document, including in the HTML tag, the meta tag, and any other relevant places.

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You can include text in multiple languages in your HTML document using the lang attribute. For example, the sentence "Esta frase es en español" will be read with a Spanish accent because it's enclosed in a paragraph with the lang attribute set to "es".

The lang attribute can be used to specify the language of a block of text, such as a paragraph or a sentence. This can be useful for accessibility and for specifying the language of non-English content.

The lang attribute can be used with a two-letter language code, such as "es" for Spanish, or a more specific code like "en-GB" for British English. The two-letter code is often sufficient, but the more specific code can be useful if you need to specify a particular dialect.

In some cases, the lang attribute may not be supported for certain languages, such as Welsh. If you try to specify Welsh, you may get unpredictable results.

You can also use the lang attribute with other attributes, such as the dir attribute, to specify the direction of the text. However, this is not demonstrated in the provided example.

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