English:
The Primordial One
Chinese:
原初的那一位
Japanese:
原初のあの方(げんしょのあのかた)

English:
Rex Lapis
Chinese:
岩王帝君
Japanese:
岩王帝君(がんおうていくん)

English:
Childe
Chinese:
公子
Japanese:
公子(こうし)

English:
Mountain King
Chinese:
山王
Japanese:
山の王

English:
comrade / partner
Chinese:
伙伴 / 搭档
Japanese:
相棒

Childe, Shikanoin Heizou, and Navia call Traveler so. While Childe calls them "comrade" and Shikanoin Heizou and Navia calls them "partner" in English version, Childe calls them 伙伴 and Shikanoin Heizou and Navia calls them 搭档 in Chinese. In Japanese version, all three calls them 相棒.
Example

"It's a deal then, partner!"

「さすが相棒! そうこなくっちゃ!」

"I'll see you again, partner!"

「またね、相棒!」

English:
Traveler
Chinese:
旅行者
Japanese:
旅人(たびびと)

English:
little cutie
Chinese:
小可爱
Japanese:
可愛い子ちゃん(かわいこちゃん)

English:
Tone-Deaf Bard
Chinese:
卖唱的
Japanese:
吟遊野郎(ぎんゆうやろう)

English:
Mr. Honorary Knight
Chinese:
荣誉骑士哥哥
Japanese:
栄誉騎士のお兄ちゃん

English:
Miss Honorary Knight
Chinese:
荣誉骑士姐姐
Japanese:
栄誉騎士のお姉ちゃん

English:
the old hag
Chinese:
老太婆
Japanese:
おばば

English:
Mr. Zhongli
Chinese:
钟离先生
Japanese:
鍾離先生 / 鍾離さん(しょうりせんせい / しょうりさん)

English:
Dr. Baizhu
Chinese:
白先生
Japanese:
白先生(びゃくせんせい)

English:
Ms. Yun
Chinese:
云先生
Japanese:
雲先生 / 雲座頭(うんせんせい / うんざとう)

English:
Uncle Mountain Shaper
Chinese:
理水叔叔
Japanese:
理水おじちゃん(りすいおじちゃん)

English:
Aunty Cloud Retainer
Chinese:
留云阿姨
Japanese:
留雲おばちゃん(りゅううんおばちゃん)

English:
milady / my lady
Chinese:
小姐
Japanese:
お嬢(おじょう)

English:
my lord
Chinese:
家主大人
Japanese:
(わか)

English:
Lady Yae
Chinese:
八重大人
Japanese:
八重様(やえさま)

English:
Her Excellency
Chinese:
(对珊瑚宫心海或雷电将军的尊称)
Japanese:
(珊瑚宮心海や雷電将軍に対する尊称)

Example

"The fact we're even able to hold out is thanks to the brilliant strategic mind of Her Excellency, Sangonomiya. We're also indebted to the great courage shown by General Gorou and the resistance troops."

「今こうしてなんとか保っているのは、 珊瑚宮様が立てた数々の妙計奇策、それとゴロー様と抵抗軍兵士たちによる奮闘のおかげさ。」

"Yes, Your Excellency!"

「はっ、珊瑚宮様!」

English:
Almighty Shogun
Chinese:
(对雷电将军的尊称)
Japanese:
(雷電将軍に対する尊称)

English:
Master Tighnari
Chinese:
提纳里师父
Japanese:
ティナリ師匠

English:
Madam Faruzan
Chinese:
珐露珊前辈
Japanese:
ファルザン先輩

English:
Lady Sorush
Chinese:
斯露莎大人
Japanese:
ソルシュ様(ソルシュさま)

English:
Demoiselle
Chinese:
大小姐
Japanese:
お嬢様

English:
Monsieur Neuvillette
Chinese:
那维莱特大人
Japanese:
ヌヴィレット様

English:
Lady Furina
Chinese:
芙宁娜女士
Japanese:
フリーナ様

English:
Salon Member
Chinese:
沙龙成员
Japanese:
サロンメンバー

English:
The Witch
Chinese:
巫婆
Japanese:
魔女婆さん(まじょばあさん)

English:
Dain
Chinese:
戴因
Japanese:
ダイン

English:
Honorary Knight
Chinese:
荣誉骑士
Japanese:
栄誉騎士(えいよきし)