 
 <prompt> Wetin dem dey call instrument wey dem dey use for accurate weighing of objects? <response>: South Slavic historically form one kind dialect continuum, i.e. each dialect get some similarities with the one wey dey near am, and differences dey increase as distance dey. But, migrations wey happun from di 16th go reach 18th centuries sake of di spread of Ottoman Empire for Balkans don cause plenty population movement wey scatter di dialect continuum into many different areas. Migrations for di 20th century, wey mostly happun sake of urbanization and wars, still join hand reduce di differences between dialects. 