The history of the Welsh language spans over 1400 years, encompassing the stages of the language known as Primitive Welsh, Old Welsh, Middle Welsh, and Modern Welsh.

The (c. 38) an Act of the Parliament of the United Kingdom, which put the Welsh language on an equal footing with the English language in Wales.

The (also often abbreviated to Cymdeithas yr Iaith or just Cymdeithas in English) a direct action pressure group in Wales campaigning for the right of Welsh people to use the Welsh language in every aspect of their lives.

The (c. 66) an act of the Parliament of the United Kingdom, which gave some rights to use the Welsh language in legal proceedings in Wales (including Monmouthshire) and gave the relevant minister the right to authorise the production of a Welsh version of any documents required or allowed by the Act.