The suggested player count listed for each minigame or world template (adventure, experience or inspiration) in Realms is not translatable.
There are four types of player counts:
%s player
%s players
%s+ players
%s-%s players
The language in the attached screenshots is set to Italian, which has been 100% translated on Crowdin. The above strings are missing from the language files and thus are untranslatable.
This ticket is partly incorrect; there are not three types of player counts.
The player count text is just fetched from what the map creators of the realm inputted into the said field when submitting their map. Not everyone inputs the same value which of course leads to inconsistencies. Sometimes, the map doesn't even have a player count; as I said before, this is because the player that submitted the map didn't choose to fill out the "player count" field. I've confirmed this but I think that a new system would have to be put in place in order to make these pieces of text translatable.