National Language Support (NLS) files are Multinational language resource files. That are responsible for Character and language conversion. In most conditions, the language displayed depends on the IDE set language. For example if the user's development environment is English, then the tooling will filter other non-English properties files, only display English properties files. NLS only supports Text and Hint widget properties.
As the above shows, there are four modules in the NLS dialog window. Below each module will be introduced:
Here user is able to choose different keys and values according to their requirements. For example if the user selects one key and value for a given widget (in this example a label widget), then the content displayed for the text will display like the following: