Formal:
* Tafadhali: This is the most common and formal way to say "please" in Swahili.
* Naomba: This literally means "I ask," and can be used as a polite request.
Informal:
* Tafadhali: This is also used in informal contexts, but with a slightly more casual tone.
* Samahani: This literally means "excuse me," but can be used as a polite request in certain situations.
* Samahani sana: This is a more emphatic way of saying "excuse me," and can be used to show extra politeness.
Examples:
* Tafadhali, unaweza kunisaidia? (Please, can you help me?)
* Naomba maji, tafadhali. (I would like some water, please.)
* Samahani, unaweza kuniruhusu kupita? (Excuse me, could you let me pass?)
* Samahani sana, unaweza kuniruhusu kupita? (Excuse me, could you let me pass, please?)
The best translation of "please" will depend on the specific situation and the relationship between the speakers.