本文根據行政院主計總處《99年人口及住宅普查報告》所載有關中華民國家庭語言使用調查資料，進行語言社會學及語言地理學分析，就本土語言的分布以及華語在臺灣扮演的兩個角色：一為臺灣的共通語，一為臺灣本土語言的競爭語言，分析華語與本土語言的互動關係。本文引用洪惟仁《臺灣語言地圖集》所載四張地圖，分別呈現 (1) 本土語言的分布狀態、(2) 華語普及狀態、(3) 華語與本土語言較優勢狀態、(4) 臺灣語言分布概況，並加以比較分析。我們期待本研究可以為臺灣的語言社會學、語言地理學作出貢獻，並為臺灣語言規劃中的語言分區提供科學的依據。

This paper provides a geolinguistic analysis of family language use in Taiwan, based on the census carried out in 2010 by the Directorate-General of Budget, Accounting and Statistics (Executive Yuan, Republic of China - Taiwan). We present four maps for this study, displaying the distribution of the three main native languages, the spreading of Mandarin, the relatively dominant languages in Taiwan, and an overview of the distribution of languages in Taiwan. We then proceed to a comparative analysis. We hope this study can contribute to both the linguistic sociology and linguistic geography of Taiwan and provide a scientific basis for language regionalization and compartmentalization in the language planning of Taiwan.