Enter a string into this project. Reload it, and enter it again! No matter how many times you reload it, if you enter a string you entered before, it will know. The Google Translate block only contacts the Google Translate service for new strings. For efficiency, each translation is saved for a while in a cache; and because of this, when the block is run, if it's accessing from a cache, the time to translate the string is extremely low compared to that usually resulting from actually contacting Google's servers. It's not a new idea to use this to check if certain data has been entered into a project before, but most executions of this idea have been overly complicated and at that stage are very slow. In this project, just enter a string, and it will tell you (even if you reload or reset all the variables or whatever) whether you've entered it recently before.
