This is the 63rd most frequent French word.
nouvelle
"Nouvelle" means "news" or "novel" (story) in English.
In this sentence, 'nouvelle' functions as an adjective meaning 'new' and agrees in gender and number with the noun it modifies, 'langue' (which is feminine singular).
Elle apprend une nouvelle langue chaque année.
She learns a new language every year.
Here, 'nouvelle' is an adjective describing 'maison', emphasizing that the house is new or recently built, and agrees in gender and number.
Cette maison est vraiment nouvelle.
This house is really new.
Here, 'nouvelle' means 'news' in a generic sense. It's a feminine noun often used to indicate a piece of information that one learns.