本文係桃園地區的語言社會學調查報告，目的是要了解在一個像桃園地區這樣一個多語言的社會中，不同語言競爭的情形。本文針對不同層次的賣場，餐廳、美髮院、夜市、機場、車站、公園等場所，實際聽取人們的語言使用。調査結果發現桃園地區的華語佔有率平均超過一半以上，閩南語和客語逐漸萎縮，而客語萎縮的情形最嚴重，原住民語言完全沒有聽到。閩南語在原閩南語區喪失地盤，但卻和華語共同入侵客語區。

This article is a report of a linguistic sociological survey, which was aimed at illustrating the situation of competition of languages in the multi-lingual Taoyuan County, Taiwan. The language use was investigated in different settings such as department stores, markets, restaurants, eateries, hairdressing salons, CKS airport, train stations, parks and other public places. It was found that Mandarin is the most dominant of the languages spoken in Taoyuan. The other native languages, including Southern Min, show severe declination, especially Hakka. The traditional domain of Hakka has been invaded by Mandarin and Southern Min. No aboriginal languages were reported in this survey. The distribution of languages is correlative with age, sex, and economy. Madarin, English, and Japanese are distributed in younger, female, and higher consumptive settings; while Southern Min and Hakka are distributed in older, male, and lower consumptive settings.