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This category contains articles with Celtic languages text. The primary purpose of these categories is to facilitate manual or automated checking of text in other languages.

This category should only be added with the {{ Lang}} family of templates, never explicitly.

For example {{ Lang| cel|text in Celtic languages language here}}, which wraps the text with <span lang="cel">. Also available is {{ Lang-cel|text in Celtic languages language here}} which displays as Proto-Celtic: *text in Celtic languages language here.