This is a maintenance category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories. This is a hidden category. It is not shown on its member pages, unless the corresponding user preference (Appearance → Show hidden categories) is set.

This category is filled by setting [isoexception] to 'dialect' in a language infobox. It is intended for dialects and other varieties of languages which do have ISO 639-3 codes; unless the variety is reclassified as a separate language, it cannot be expected to ever have an ISO code, so there is no point in listing it in the main ISO maintenance category, which is intended to capture articles where the ISO code was overlooked.