Norway has two official languages, both called "Norwegian", namely Bokmål (nb_NO) and Nynorsk (nn_NO).
The NorwegianMinimalStemFilter and NorwegianLightStemFilter today only works with the largest of the two, namely Bokmål.
Propose to incorporate "nn" support through a new "vaiant" config option:
- variant="nb" or not configured -> Bokmål as today
- variant="nn" -> Nynorsk only
- variant="no" -> Remove stems for both nb and nn