This looks like an issue with our current cartography. As we are working on a new cartography, I'm not sure it make sense to try to fix the current one. I could be completely wrong on that, @Pnorman knows best!

Guyana is a sovereign state (country), but French Guiana is part of France.

The screenshots above highlights an area that is claimed by Venezuela, see: https://simple.wikipedia.org/wiki/Guayana_Esequiba

I recommend you to take into account this document to label the new cartography.

This is a bug, but we're not clear on if it's a data issue, a style issue, or what the style issue is, so it needs more triage.

With respect to French Guiana, @Mattflaschen-WMF is correct about why the name isn't displayed. French Guiana (https://www.openstreetmap.org/node/313753808) is considered in OSM to be a "state" as it's an overseas department of France, and "state" names aren't displayed at all in osm-bright, the current Wikimedia map style. (Similarly, for example, U.S. state and Canadian province names are also not displayed on https://maps.wikimedia.org at any zoom level).

I still need to figure out what's going on with Guyana.

I should also note that this will be automatically resolved if and when we ever deploy the brighmed style.

http://legolas.paulnorman.ca:6789/brighmed/#7/4.741/-55.206

This issue doesn't appear to be unique to our tile server. This unrelated tile server showcasing osm-bright also never displays Guyana's name:

https://openmaptiles.github.io/osm-bright-gl-style/#4.42/5.571/-53.278

In T181805#4610464, @Mholloway wrote:

This issue doesn't appear to be unique to our tile server. This unrelated tile server showcasing osm-bright also never displays Guyana's name:

https://openmaptiles.github.io/osm-bright-gl-style/#4.42/5.571/-53.278

Someone had deleted Guyana's label node, see OSM history browser. Now that I restored the node it displays again for zoom levels/languages that have been updated, e.g. for French Wikipedia example above.