Welsh nationalism is a political and cultural movement that seeks to promote and preserve the identity, language, and culture of Wales. It advocates for greater autonomy or independence for Wales within the United Kingdom, emphasizing the importance of the Welsh language and local traditions. The movement has historical roots, with significant developments occurring in the 20th century, particularly with the formation of the Plaid Cymru party in 1925. Welsh nationalists aim to ensure that Wales has a strong voice in political matters and that its unique heritage is recognized and celebrated.