**Learn Bokmål, using a course with eastern Norwegian or Oslo-area pronunciation.** That is the most practical choice for your trip to Oslo and Hurum.

The confusing part is that these names mostly describe **written standards**, rather than separate languages you must choose between when speaking:

- **Bokmål** is one of Norway’s two official written standards. Urban speech in southeastern Norway is relatively close to it, making it a useful starting point for your destination.
- **Nynorsk** is the other official written standard, developed from Norwegian dialects. It is not a single spoken dialect. [NTNU’s explanation](https://www.ntnu.edu/learnnow/info/background/forms)
- **Riksmål** is a conservative written standard now very close to moderate Bokmål. You do not need to study it separately for a holiday. [Riksmålsforbundet’s explanation](https://www.riksmalsforbundet.no/qa_faqs/hva-er-forskjellen-pa-riksmal-og-bokmal/)

**You should generally be understood whichever regional pronunciation you learn**, provided your pronunciation and sentences are reasonably clear. You do not need to imitate the local dialect. The bigger challenge for a beginner is likely to be understanding replies: Norwegian has no single official spoken standard, and people commonly retain their dialect when talking to learners. [NTNU on spoken Norwegian](https://www.ntnu.edu/now/intro/background-spoken-norwegian)

For a short trip, focus on useful phrases and listening practice rather than the differences between spelling standards. [NTNU’s free LearnNoW course](https://www.ntnu.edu/learnnow) is a suitable starting point.