This is a tracking category. It is used to build and maintain a list or lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set. These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or subcategories into a larger, more efficient list (discriminated by classifications). Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

This is a temporary category used to collect pages from all namespaces that use any of the {{lang-??}} templates supported by Module:Lang. These templates will be merged to {{langx}}, per the closure at Wikipedia:Templates for discussion/Log/2024 September 27 § Replace and delete lang-?? templates. This category will help to determine the scope of the replacement work and serve as a measure of how much work remains.