The same "Join Realm" string is used for two buttons with different meanings

The new Join Realm string mco.selectServer.joinRealm is used both for the small button in the top right corner of the main Realms screen as well as for the button which actually makes you join.

While this is correct in English, in many languages these two texts should be translated as if they were Join a Realm and Join this Realm, for grammar’s sake.

In the first case, you want to join a Realm and get lead to the “enter join code” page, in the second case you’ve already decided which Realm to join and want to join this Realm whose code you input.

Fix if it gets solved before stable 26.3

This can be fixed by adding another string for the long button. Consistency with servers and with the keys for the join code screen is kept if something like mco.selectServer.joinCode.select is added, having it to be Join Realm in English, thus:

"mco.selectServer.joinCode.select": "Join Realm",
     ^ for the long button, i.e. Join this Realm
"mco.selectServer.joinRealm": "Join Realm",
     ^ for the short button, i.e. Join a Realm

Fix if the bug has stayed past stable 26.3

To also fix it retroactively, which obviously isn’t required for snapshots but is nice for stable versions, there should be another string for the short button instead, maybe called mco.selectServer.toJoinCode; the logic here being that having two Join this Realm buttons (even before you enter a code) is less confusing than having two vague Join a Realm buttons (even after you’ve just entered the code):

"mco.selectServer.joinRealm": "Join Realm",
     ^ for the long button, i.e. Join this Realm
"mco.selectServer.toJoinCode": "Join Realm",
     ^ for the short button, i.e. Join a Realm

Reference for consistency with servers

The “direct connection” screen for servers has two different strings for the same mechanism: Direct Connection selectServer.direct and Join Server selectServer.select, which pretty correspond to Join a Realm and Join this Realm but with servers.