What is yachi da in Welsh?

"Yachi da" is a Japanese phrase that translates to "That's right!" or "You're right!" in English. There isn't a direct equivalent of "yachi da" in Welsh.

However, depending on the context, you could use phrases like:

* "Mae'n wir!" (It's true!)

* "Dyna chi'n dweud!" (That's what you say!)

* "Dyna'n wir!" (That's right!)

* "Rwy'n cytuno!" (I agree!)

Ultimately, the best translation will depend on the specific situation and the tone you want to convey.