The language aware filter field allows you to further filter down the displayed list of records using a word, words, or a phrase. The filter operates on fields such as description which contain natural language information, and, on other fields to a lesser degree if they are language constructs like names. The filter is language aware in that it attempts to understand what you are looking for. For example, if you type "yellow gold rings", it will understand what you are looking for and include records in the result which contain variations on that phrase without requiring them to be an exact match (like "ring" vs "rings") or in the same order (like "rings made of yellow gold").

The language aware filter is a complex and advanced piece of functionality that will take some time to fully comprehend. But once you understand's it nuances, you will find it to be an invaluable tool for locating information.