How to localize a changing text

I apologize if I missed this in the tutorial, but according to this: inter-illusion.com/tools/i2-localization/how-to-localize , it seems that the only way to localize a text is to add the localize script to your object and make sure that the text is in the main source.

Here is what I did: I added the term "run fast" to the source, and then I added the localize script to the guitext. The twist is that the text starts out with the text "don't run", and then later it will change to run fast, which is the text that I want to translate. I wish there was a line of code that would just localize every single guitext that I display but for now this is my issue.

Okay seems simple, but when I use that particular line there is a minor problem. It says that the namespace Localize has not been found, so I looked at the Localize script and saw it had the namespace I2.Loc but when I used that, it says that it is looking for a type.