teach in English and many television channels are in English. The use of Breton and Welsh has historically been discouraged by French and British governments respectively. There are also instances of intolerance to the speaking of Native American languages at some schools, thus forcing those students to create small communities in which they can speak their native language, thereby creating "language boundaries" on a very small scale. Examples like these illustrate the impact that language boundaries can have on cultural boundaries, even if they are not necessarily one and the same. Annotated bibliography See also Isogloss Language island Linguistic geography Adstratum Sociolinguistics Borders Language geography