Formal:
* Karibu nyumbani kwetu. (This is the most common and literal translation.)
Informal:
* Karibu nyumbani. (This is a shorter version of the formal greeting, still polite but more casual.)
* Karibu sana nyumbani kwetu. (This emphasizes the welcome and adds "very" to "welcome.")
* Karibu tu nyumbani. (This means "Just come in," and is very informal.)
Adding a personal touch:
* Karibu nyumbani, rafiki. (Welcome home, friend.)
You can choose the appropriate greeting based on your relationship with the person you are welcoming.