The verb “translate” is ترجم (tarjama) in Arabic.

From this verb, a number of different nouns can be derived including “translator”. The word for “translator” (male, singular) is مترجم (mutarjim) and for “translator (female, singular) is مترجمة (mutarjima). The plural, masculine form of the word is مترجمون (mutarjimun) or in some grammatical situations, it is مترجمين (mutarjimin). The feminine, plural form (”translators”) is مترجمات (mutarjimat).

Another noun derived from the verb is “translation”. The singular form of the word is ترجمة (tarjima) and the plural is ترجمات (tarjimat).

The BBC Xtra English program for March 26, 2007 was about translators or more specifically about subtitlers (people who write subtitles for films). They talk about how skill and quality is important for the job, and how lack of quality has led to some “bad translations”. They use the word ركيكة (rakika) to describe these as “weak, meager, poor quality, feeble” - ترجمة ركيكة (tarjima rakika).

The entire clip can be heard on the BBC Xtra English website:
http://news.bbc.co.uk/hi/arabic/elt/newsid_6495000/6495143.stm