In the cutscene that closes out CH34, Dion is handed an imperial proclamation and informed that his younger half-brother has been named emperor. With freecam, you can actually take a closer look at the text. The proclamation reads as follows:
By the Emperor
A PROCLIMATION
Of the Transference of the Holy Imperial Throne to Olivier Lesage. His Radiance the Holy Emperor Sylvestre hereby makes known to his most loyal servants and subjects His forfeiture of the imperial throne, crown, and scepter, and their investiture to His son, Olivier Lesage, who shall heretofore rule over all lands and peoples of the Holy Empire of Sanbreque as his Radiance the Holy Emperor Olivier, until such time as He relinquishes the throne by means of forfeiture, incapacity, or death.
Glory be to Greagor
LOGOSの34ページに下記の和訳が載せられています：
布告
オリヴィエ殿下への譲位について
現神皇シルヴェストル猊下は、ここに、
玉座、玉冠、玉笏、
そして聖衣の放棄を忠実なる臣民に告げ知らせる。
以降は現皇太子たるオリヴィエ殿下が、
新神皇オリヴィエ猊下として、皇国のあらゆる領土と民を支配する。
皇位の放棄、不適格性の発覚、死のいずれかの理由で、
皇位を退くまでオリヴィエ猊下の統治権は有効である者とする。
グエリゴールに栄光あれ
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