Vous avez cherché: rex in imperio suo est imperator (Latin - Anglais)

rex in regno suo est imperator
the king in his own kingdom is emperor

diu in imperio
long live the empire

pater meus in cubiculo suo est.
my father is in his room.

rex in tenebris
dark

vivat rex in aeternum
god save the king, god save the king live for ever:

ut succedas mihi et geras pacem prosperitatemque in imperio romano
by carrying through in the peace and well-to me and to the roman empire, in order to succeed

igitur abia confortato imperio suo accepit uxores quattuordecim procreavitque viginti duos filios et sedecim filia
but abijah waxed mighty, and married fourteen wives, and begat twenty and two sons, and sixteen daughters.

in luce caecae caligines sunt, et in caliginibus, lux. in arcu imperium est, et in imperio, nox.
in the light the blind are darkness, and in the darkness, light. in the arch is the empire, and in the empire, the night.

responderuntque chaldei regi syriace rex in sempiternum vive dic somnium servis tuis et interpretationem eius indicabimu
then spake the chaldeans to the king in syriack, o king, live for ever: tell thy servants the dream, and we will shew the interpretation.

in diebus eius ascendit pharao necho rex aegypti contra regem assyriorum ad flumen eufraten et abiit iosias rex in occursum eius et occisus est in mageddo cum vidisset eu
in his days pharaoh-nechoh king of egypt went up against the king of assyria to the river euphrates: and king josiah went against him; and he slew him at megiddo, when he had seen him.

venit ergo bethsabee ad regem salomonem ut loqueretur ei pro adonia et surrexit rex in occursum eius adoravitque eam et sedit super thronum suum positus quoque est thronus matri regis quae sedit ad dexteram eiu
bath-sheba therefore went unto king solomon, to speak unto him for adonijah. and the king rose up to meet her, and bowed himself unto her, and sat down on his throne, and caused a seat to be set for the king's mother; and she sat on his right hand.

transivit ergo rex in galgalam et chamaam cum eo omnis autem populus iuda transduxerat regem et media tantum pars adfuerat de populo israhe
then the king went on to gilgal, and chimham went on with him: and all the people of judah conducted the king, and also half the people of israel.

locutus est ergo ionathan de david bona ad saul patrem suum dixitque ad eum ne pecces rex in servum tuum david quia non peccavit tibi et opera eius bona sunt tibi vald
and jonathan spake good of david unto saul his father, and said unto him, let not the king sin against his servant, against david; because he hath not sinned against thee, and because his works have been to theeward very good:

et ingressi servi regis benedixerunt domino nostro regi david dicentes amplificet deus nomen salomonis super nomen tuum et magnificet thronum eius super thronum tuum et adoravit rex in lectulo su
and moreover the king's servants came to bless our lord king david, saying, god make the name of solomon better than thy name, and make his throne greater than thy throne. and the king bowed himself upon the bed.