Common

Across whole - and sometimes multiple - landmasses, a unifying Common tongue helps bind the various peoples in a single speech that all can easily learn and use. Regardless of country or continent, there can be found a Common language: a relatively simple base of easily graspable phonemes, with a typically logical arrangement of subject, preposition, tense, and clause. Dialects and time can each lend variances to particular cultures throughout a given land; but by the necessity of efficiency by traders, defense, etc., there always remains a core of versatile and extremely efficient language roots.

Script
While common script can be as various as the sounds it captures from continent to continent, like vocalization, script also maintains common pillars. Often forming around a center of common shapes, forms, or patterns, common scripts are designed to be easy to write and read quickly.