Formal:
* Helo fy annwyl gyfeillion: This literally translates to "Hello my dear friends" and is a polite way to address a group.
Informal:
* Helo fy anwyliaid: This translates to "Hello my loves" and is a more affectionate way to address a group, particularly if they are close to you.
* Helo 'na, fy anwyl: This translates to "Hello there, my love," and is a more intimate way to address someone you know well.
More literal:
* Helo, fy nghyfriniaid: This translates to "Hello, my darlings," and is a more literal translation of the phrase. However, it might sound a bit strange in Welsh.
The best option will depend on the context and your relationship with the people you are addressing.
You could also use a more general greeting like:
* Bore da! (Good morning)
* Prynhawn da! (Good afternoon)
* Nos da! (Good evening)
Followed by a phrase like:
* Sut mae 'ch chi? (How are you?)
This would be a more natural and common way to greet someone in Welsh.