The bilingual lexicon.
Root-indexed English / Arabic terms for the whole universe — so an idea means the same thing in every academy, in either language. Branch D, BCIA and the lexicon ship Arabic-first with an hreflang pair.
EN / ع
Bilingual EN / عربي is a first-class requirement, not a translation afterthought. Every academy submits a term sheet; the lexicon collects them into one root-indexed reference.