Belgium is a good place to explore language conflict and compromise. Language rights development in Belgium changed from the focus of personal principle to that of territory principle which emphasizes ”good fences make good neighbors.” This paper attempts to discuss Belgium's language policy from the viewpoint of language contact. The structure of this paper is as follows: after the introduction, the history of language conflict in Belgium will briefly be reviewed, and then the causes and the cures of language conflicts will be explored through the theory of language contact. Then, Belgium's experiences with the territory principle are summarized with discussions of its implications for language peace and language maintenance. Suggestions for Taiwan's language policy are also provided.