Here are some options:
For "nosy":
* Nānā pono ʻole: This literally means "look well, not good," implying a lack of respect for boundaries. It's often used for someone who is overly inquisitive or intrudes on others' personal affairs.
* Kūpuna noʻonoʻo: This translates to "old person thinking" and suggests someone who is overly inquisitive, perhaps even meddling, in a way that's seen as inappropriate.
* Nānā nui: This means "look big" and implies someone who is overly observant and scrutinizing, almost to the point of being suspicious.
For "curious":
* Hoʻohihi: This means "to be interested, to be curious" and has a more neutral connotation.
* Makemake e ʻike: This translates to "want to know" and emphasizes the desire for information or understanding.
* Nānā hoihoi: This means "look interested" and implies a genuine curiosity or fascination.
The best translation for you will depend on the specific context and the nuance you want to convey.
For example, if you want to express that someone is prying into someone else's business, "nānā pono ʻole" would be more appropriate. But if you want to express a genuine interest in something, "hoʻohihi" or "makemake e ʻike" would be better choices.