It's possible that:
* It's a misspelling. There might be a similar phrase with a slightly different spelling.
* It's a specific local term. The phrase might be specific to a particular region or community.
* It's a fictional creation. It could be a name made up for a story, character, or product.
To help understand the meaning, please provide more context, such as:
* Where did you encounter this phrase? (e.g., book, movie, conversation)
* What was the surrounding text or conversation?
* What language is the phrase supposed to be in?
With more information, I can better assist you in determining the meaning of "Feste Lariane".