The realm 主宰之剑 does not seem to be listed in the TW (Taiwan) region when I look at the realm index on battle.net. Here are the available TW realms:
"shadowmoon": "暗影之月",
"spirestone": "尖石",
"stormscale": "雷鱗",
"dragonmaw": "巨龍之喉",
"frostmane": "冰霜之刺",
"sundown-marsh": "日落沼澤",
"hellscream": "地獄吼",
"skywall": "天空之牆",
"world-tree": "世界之樹",
"crystalpine-stinger": "水晶之刺",
"zealot-blade": "狂熱之刃",
"chillwind-point": "冰風崗哨",
"menethil": "米奈希爾",
"demon-fall-canyon": "屠魔山谷",
"whisperwind": "語風",
"bleeding-hollow": "血之谷",
"arygos": "亞雷戈斯",
"nightsong": "夜空之歌",
"lights-hope": "聖光之願",
"silverwing-hold": "銀翼要塞",
"wrathbringer": "憤怒使者",
"arthas": "阿薩斯",
"queldorei": "眾星之子",
"icecrown": "寒冰皇冠",
"order-of-the-cloud-serpent": "雲蛟衛",
@augustcrush – similar issue for you, 水晶之 does not appear in the list of KR (Korea) realms, here is what I have:
"burning-legion": "불타는 군단",
"azshara": "아즈샤라",
"dalaran": "달라란",
"durotan": "듀로탄",
"norgannon": "노르간논",
"garona": "가로나",
"windrunner": "윈드러너",
"guldan": "굴단",
"alexstrasza": "알렉스트라자",
"malfurion": "말퓨리온",
"hellscream": "헬스크림",
"wildhammer": "와일드해머",
"rexxar": "렉사르",
"hyjal": "하이잘",
"deathwing": "데스윙",
"cenarius": "세나리우스",
"stormrage": "스톰레이지",
"zuljin": "줄진",
If you are actually playing in the CN (China) realm, perhaps you imported some addon settings that changed your realm? This post describes how to change that:
Let me know if that resolves the issue. If it does not, we can investigate further. Perhaps there is a locale/translation issue with some realm names.