所谓的禁说威尔斯语（Welsh Not、Welsh Note、NOT或 Welsh stick）是十九世纪末至二十世纪初，在威尔斯的某些学校所施行的一种处罚方式，目的是为了防止学童说威尔斯语。

被发现在学校说威尔斯语的学童，脖子上会被挂上一块写有"WN (Welsh Not)"的木板，直到他找到另一个在学校使用威尔斯语的学童，才可以把木板交给下一个学童。放学前最终持有这块木板的学童则必须接受体罚。这项规定的出现是因为在当时，某些人士认为英语是唯一一种适合用来教育的语言。据传学校必须事先取得家长的同意方能实施这项规定。

The Welsh Not or Welsh Note or Welsh stick was a punishment used in some schools in Wales in the 19th and possibly early 20th century to dissuade children from speaking Welsh. It was represented as a piece of wood, inscribed with the letters "WN", that was hung around the necks of children who spoke Welsh during the school day.