请问：RC文件与Locale

littlefrog_nuaa

在RC文档中说：
For each RC file, in addition to the file itself, GTK+ will look for a locale-specific file that will be parsed after the main file. For instance, if LANG is set to ja_JP.ujis, when loading the default file ~/.gtkrc then GTK+ looks for ~/.gtkrc.ja_JP and ~/.gtkrc.ja, and parses the first of those that exists.

这的意思是不是指当我为程序指定一个rc文件后，他会根据当前的locale值来判断读取哪个字体文件？不仅界面可以得到改变，界面上当字体也都可以进行改变呢？？那这样当话为是不是就可以改变locale的值来改变程序界面的语言呢？？
请各位高手指教！

另：Ubuntu系统，当LANG=zh_CN.UTF-8时，系统读取当是哪个字体文件阿？LANG=C时呢？谢谢大家！