TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: A language isolate , in the absolute sense , is a natural language with no demonstrable genealogical ( or " genetic " ) relationship with other languages , one that has not been demonstrated to descend from an ancestor common with any other language .

SOLUTION: A language isolate is a language that is not known to be related to any other language .

PROBLEM: He acceded to the Chrysanthemum Throne upon the abdication of his father , the now-Emperor Emeritus Akihito on 1 May 2019 at 00:00 local time ( 15:00 UTC ) .

SOLUTION: He has been on the Chrysanthemum Throne since his father Akihito abdicated in 2019 .

PROBLEM: The Bucures ̦ ti - Ilfov development region is a development region in Romania , encompassing the national capital , Bucharest , as well as the surrounding Ilfov County .

SOLUTION:
The Bucharest-Ilfov development region is a development region in Romania .