"Dych chi eisiau orennau?"

Translation: Do you want some oranges?

[socketandy]

Slightly confused why "an orange" was wrong... but "oranges" is correct... seems a little inconsistent with some of the other sentences. How would we say "an orange"?

[EllisVaughan]

An orange= Oren, since welsh doesn't use indefinite articles (a/an) and therefore oren also means orange. Orennau is the plural and therefore "an orange" is an incorrect translation.