用源程序编码错误，但不在控制台

I am having some strange Encoding problems when using sourcing in R-Studio, but not when directly ctrl+enter while developing the script. Basically, I'm creating a data.frame storing words from different languages along with their english translation. This works fine until I source. I realize this may be Encoding problems, but I am really not sure how to proceed, nor do I fully understand why the error I get (unexpected INCOMPLETE_STRING) only occurs with source. Do I need to change the encoding before each language change? How do I know which encoding will be the correct one?I am having some strange Encoding problems when