The content of Bokmålsordboka and Nynorskordboka is openly available for download. It may be used for any purpose, including commercial use, in accordance with the applicable terms. Read more about the open licence here
The information in the inflection tables in Bokmålsordboka and Nynorskordboka is sourced from the Norwegian Language Bank. The Language Bank is a lexical database for Bokmål and Nynorsk, providing information on word class and standardized inflection for far more words than those found in standard dictionaries. The Norwegian Language Bank is available for download from Språkbanken at the National Library under the CC-BY 4.0 license.