[LargeTomato]

In Arabic there is no word for "uncle". There is only "dad's brother" and "mom's brother". Often times an English speaker will leave out the paternal/maternal portion and the Arabic sentence may be ambiguous. If the English speaker later specified the needed information and the Arabic translator guessed wrong then there's a confusing problem here and the Arabic listener might get confused.

[karmakaze]

Is there no structure to express a parent's (or father's or mother's) brother? It may not flow well but avoids making incorrect assumptions.

[rootsu]

In my language, there are two different words for Maternal uncle and Paternal uncle, so translating from English without any context might completely change the relationship.