* Neighborhoods are dynamic: The number of languages spoken in a neighborhood can change constantly as people move in and out.
* Defining a neighborhood: What constitutes a neighborhood? It can vary widely in size and definition.
* Language data: There isn't a comprehensive database that tracks language use in every neighborhood across the US.
To get a better answer, you would need to:
1. Specify the neighborhoods: Which three neighborhoods are you interested in?
2. Specify a timeframe: Are you looking for a snapshot in time, or are you interested in historical trends?
Even with that information, getting an exact count would be difficult. However, you could:
* Consult local census data: The US Census Bureau collects some information on language spoken at home, but it's not always broken down to the neighborhood level.
* Research local community groups: Organizations that serve specific immigrant communities might have information about the languages spoken within their areas.
* Conduct a survey: You could create a survey to be distributed within the neighborhoods to get a more direct picture of language use.
Let me know if you have specific neighborhoods in mind, and I can help you find some resources!