Is the data to be translated Static or Dynamic? Is it stored in the database?
For a static translation, you might explore the feature of MLE(Multi-Language Enabled) feature of LN and try activating the Arabic language pack(check and confirm if there is one with Infor Support)
Once done, you need to import the translated data into LN using Import utility present under Tools->Translation(not exactly sure where it is) and then customize the report using proper tools functions.
There is no real time translation in LN as far as I know. All you need is a pure customization here.
Some more info here - http://www.baanboard.com/baanboard/showthread.php?t=48988