I appreciate your request, but I don't have the context you referenced to base an accurate overview on. To write a faithful 2-sentence explanation of "Category:Wikipedia templates by topic," I would need to see the actual category description or documentation you intended to provide. Could you share the context so I can write an accurate, sourced overview?
AI-generated from the Wikipedia summary — may contain errors.
This is a container category. Due to its scope, it should contain only subcategories.
Wikipedia templates grouped by encyclopedic topic. See: Portal:Contents/Categories for further information.
via Wikidata sitelinks · CC0
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).