The Commissioner's role is to promote and facilitate the use of Welsh and ensure that it is treated no less favourably than English.

The Commissioner can also investigate alleged interferences with an individual's freedom to use Welsh in certain circumstances and is supported by an advisory panel.

"[6] The measure was not welcomed warmly by all supporters: Bethan Williams, chairman of the Welsh Language Society (Cymdeithas yr Iaith Gymraeg) gave a mixed response to the move, saying, "Through this measure we have won official status for the language and that has been warmly welcomed.

Despite that, an amendment to that effect was supported by 18 Assembly Members from three different parties, and that was a significant step forward.

[9][10] In October 2022, Efa Gruffudd Jones was appointed as Welsh Language Commissioner, to take up the position in January 2023.