langfr

langfr is an informal label used to denote content in the French language in digital and publishing contexts. It commonly appears as the language code fr (from the ISO 639-1 standard) and in variants such as fr-FR, fr-CA or fr-CH to indicate regional varieties. The term may be seen in attributes, class names, filenames or metadata (for example lang="fr" in HTML, xml:lang="fr" in XML, or a CSS class like .lang-fr).

Specifying French with lang="fr" or equivalent serves several purposes: it helps user agents and assistive technologies apply correct pronunciation rules and language-specific processing; it enables proper hyphenation, spellchecking and font selection; it supports search engines and indexing for language-aware search; and it assists localization workflows and content negotiation. For regional targeting and disambiguation, BCP 47 tags (RFC 5646) combine language and region subtags (for example fr-CA).

Accessibility guidelines such as WCAG recommend declaring the primary language of a page or content region so screen readers and other assistive tools can render text accurately. In multilingual websites, attributes and link elements like hreflang help route users and search engines to the most appropriate localized content. In code and tooling, "langfr" or similar identifiers are a practical shorthand to mark, style, or process French-language material.