Romance Languages
* Spanish: ¡Bienvenido/a! (formal), ¡Hola! (informal)
* French: Bienvenue!
* Italian: Benvenuto/a! (formal), Ciao! (informal)
* Portuguese: Bem-vindo/a! (formal), Olá! (informal)
* Romanian: Bun venit!
Germanic Languages
* German: Willkommen!
* Dutch: Welkom!
* Swedish: Välkommen!
* Norwegian: Velkommen!
* Danish: Velkommen!
* Icelandic: Velkomin/n!
Slavic Languages
* Russian: Добро пожаловать (Dobro pozhalovat')
* Polish: Witaj!
* Czech: Vítejte!
* Ukrainian: Ласкаво просимо (Laskavo prosimo)
* Serbian: Добродошли (Dobrodošli)
Other Languages
* Chinese (Mandarin): 欢迎 (Huānyíng)
* Japanese: ようこそ (Yōkoso)
* Korean: 환영합니다 (Hwan-yeong-hamnida)
* Arabic: أهلاً وسهلاً (Ahlan wa sahlan)
* Hindi: स्वागत है (Swagat hai)
* Greek: Καλώς ήρθατε (Kalos irthate)
* Turkish: Hoş geldiniz!
Note:
* These are just a few examples, and there are many other ways to say "Welcome" in different languages.
* Some languages have different forms of "Welcome" depending on the gender of the person being welcomed.
* In some languages, it is considered more polite to use a formal greeting, while in others, an informal greeting is more appropriate.
I hope this is helpful!