[mcv]

OpenStreetMaps has excellent maps, and there are many apps that use it. Unfortunately their search is usually not that good.

I use Organic Maps, and also have OsmAnd. Great maps, poor search. I'd love to know if there's an app with better search.

[deng]

Well, at the moment OSM has the tag

"official_name:en-US"="Gulf of America"

but it changes regularly (see https://www.openstreetmap.org/node/305639190). How the map providers deal with this tag is up to them. There's actually a huge discussion how to deal with this. It's... complicated:

https://community.openstreetmap.org/t/gulf-of-america-gulf-o...

[mcv]

That sounds reasonable. name:en is still "Gulf of Mexico". That way I suppose the app can choose whether to use the general English or US-specific name.