Sorry, I didn’t realize I was getting in the middle of things. Another mapper reached out to me and asked me to take care of Vietnamese.

> Is Vịnh Mexico more common than Vịnh México?

It’s complicated. Vietnamese spelling of foreign place names is notoriously unstandardized, mostly a matter of personal preference. This goes for both the country and the gulf. In Vietnam, Mê-hi-cô is probably the most common “formal” name, being preferred by the government and in educational materials. However, in the U.S., the preferred formal name is Mễ Tây Cơ or Mễ. At this point, neither country understands the other country’s name at all. In both countries, Mexico is very common informally because it’s mutually intelligible and easier to type. Wikipedia’s approach is to use the Spanish name verbatim, which feels more learned: México.

Any of these names could reasonably be the name:vi=* on Mexico, but it’s currently México, so I guess the gulf could also use this spelling.