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Intlayer Vanilla JS Template
Published8 April 2026
Last Scan8 April 2026
Intlayer VersionStable
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Explore other projects that use Intlayer for their internationalisation.
SEO & Global Reach
Technical analysis of internationalisation best practices.
Lang tag:
The
lang attribute on the <html> tag declares the primary language of the page. This helps search engines and browsers understand the content language.Why it matters: Essential for SEO and accessibility. Screen readers use it to pronounce content correctly.
HTML dir:
The
dir attribute on the <html> tag specifies the text directionality of the content. This is essential for languages that are written right-to-left (RTL).Why it matters: Critical for proper rendering of RTL languages like Arabic, Hebrew, Persian, and Urdu. Improves readability and user experience.
Values:
ltr (left-to-right), rtl (right-to-left), or auto.Hreflangs:
Hreflang links tell search engines about alternative language versions of your page. They prevent duplicate content issues and help serve the right language to users.
x-default:
Indicates whether the page includes an
x-default hreflang tag. This tag specifies a default/fallback page for users whose language preferences don't match any specific hreflang.Canonical:
A canonical tag tells search engines which version of a URL is the "master" copy. Critical for avoiding duplicate content penalties in multilingual sites.
Best practice: Each language version should have its own canonical pointing to itself, not to another language.
Localized links:
Checks if the site contains links to localized content. This indicates proper internal linking between language versions.
Good practice: Cross-link between language versions using hreflang alternates and language switchers.
Helps with: User navigation between languages and search engine discovery of all versions.
All anchors localized:
Checks if all internal links on the page include a locale prefix in their path (e.g.,
/en/, /fr/). This is crucial for proper language routing.Why it matters: Ensures consistent language experience and proper URL structure for multilingual sites.
robots.txt
Accessible:
The
robots.txt file is a text file that tells search engine crawlers which pages or sections of your website they can or cannot access.Why it matters: Essential for controlling crawler access and protecting sensitive areas while allowing important content to be indexed.
Disallow w/o locale alternates:
Paths that are disallowed in
robots.txt but have no equivalent locale-specific versions. This can indicate incomplete internationalization.Example issue: If
/admin/ is disallowed but there's no /en/admin/, /fr/admin/, etc., it may suggest the site structure doesn't consistently use locale prefixes.Best practice: Ensure all disallowed paths have locale equivalents if your site uses URL-based localization.
sitemap.xml
URLs discovered:
The total number of URLs found in your
sitemap.xml file(s). Sitemaps help search engines discover and index all pages on your website.Good practice: Keep sitemaps up-to-date and organized. For large sites, use sitemap index files that reference multiple sitemaps.
Impact: More discovered URLs mean better coverage for search engine indexing.
Alternates present:
Indicates whether your sitemap includes
<xhtml:link> elements with alternate language versions. This tells search engines about all language variations of each page.Best practice: Include alternates in sitemap to help search engines understand the relationship between language versions.
x-default present:
The
x-default hreflang tag specifies a default page for users whose language isn't explicitly targeted. It's a fallback for international users.Best practice: Point
x-default to a language selector page or your most universal language version (often English).
Important: Every set of hreflang alternates should include an x-default.