[SDPhantom]

Unfortunately, without the same addon running on both sides, there's no way to get another player's locale. The servers were set up in a way in which this matter is irrelevant and are grouped by location instead as indicated by your region. As mentioned earlier, there are libraries that give you a likely scenario based on server name, but this is based on what percentage of a server's population is of a specific locale from census data collected provided from users themselves. Also, other players can be multilingual, so you can try in whatever languages you feel comfortable conversing in. There's no harm in it.