A national language version (NLV) is a version of the i5/OS™ that contains a predefined set of language-dependent values like date format, time format, sort sequence, and so forth for a particular language.
When you order an i5/OS licensed program, you identify the national language version you want by specifying a language feature code. If you want to use more than one national language version of a licensed program, you can order additional languages. For example, if you are a German customer, you might need support for both German and French on one server. You can order a national language version for German and a national language version for French.
When you order more than one national language version for a server, you designate one of the versions as the primary language. The primary language you designate is the feature code identified when you ordered the operating system. You designate all other national language versions as secondary languages.
You must order some of the licensed programs for your server with the same language feature code as the primary language of the system. If the language feature code of a licensed program differs from the language feature code of the primary language of the server, the licensed program might not install correctly. Licensed programs with different feature codes as the primary language can be installed as a secondary language.