There is no in-built functionality in Oracle Database to translate text. You'll have to find a service/program to do this or store the translations yourself.

If going the DIY route, create tables to store the a lookup code for each item you want to translate and the text in each language you want to support.

For example:

create table translations (
  text_code    varchar2(30), -- lookup code for the text item
  english_text clob,
  arabic_text  clob,
  ...
);

OR

create table translations (
  text_code    varchar2(30), -- lookup code for the text item
  language_code varchar2(2), -- EN, DE, AR, etc.
  text          clob,
  ...
);