(25:26) True sovereignty, that Day, is for the Most Merciful. And it will be upon the disbelievers a difficult Day.
Muhammad Taqi-ud-Din al-Hilali and Muhammad Muhsin Khan,
(25:26) The sovereignty on that Day will be the true (sovereignty), belonging to the Most Beneficent (Allah), and it will be a hard Day for the disbelievers (those who disbelieve in the Oneness of Allah Islamic Monotheism).
Mohammed Marmaduke William Pickthall
(25:26) The Sovereignty on that day will be the True (Sovereignty) belonging to the Beneficent One, and it will be a hard day for disbelievers.
Abdullah Yusuf Ali
(25:26) That Day, the dominion as of right and truth, shall be (wholly) for (Allah) Most Merciful: it will be a Day of dire difficulty for the misbelievers.
Mohammad Habib Shakir
(25:26) The kingdom on that day shall rightly belong to the Beneficent Allah, and a hard day shall it be for the unbelievers.
(25:26) The Kingdom, upon that Day, the true (Kingdom), will belong to The All-Merciful, and it will ever be a Day difficult for the disbelievers.
(25:26) The sovereignty on that Day will absolutely and belong to the All-Merciful, (which He will exercise then with no intermediary veil of cause and effect). It will be a hard day for the unbelievers.
Amatul Rahman Omar
(25:26) The true sovereignty that day shall belong only to the Most Gracious (God) and it shall be really a (very) hard day for the disbelievers.
(25:26) The ownership/kingdom, the truth (on) that day (is) to the merciful, and (it) was on the disbelievers a difficult/distressing day/time .
(25:26) The real sovereignty will belong to Ar-Rahman. How grievous will be the day for the infidels!
A. J. Arberry
(25:26) the Kingdom that day, the true Kingdom, shall belong to the All-merciful and it shall be a day harsh for the unbelievers.
Abdul Majid Daryabadi
(25:26) The dominion on that Day rhall is; be the true dominion, of the Compassionate, l and it shall be anday upon the infidels hard.
Maulana Mohammad Ali
(25:26) and the Absolute kingdom will belong to the Beneficent God.
Hamid Abdul Aziz
(25:26) The day the heavens shall be cleft asunder with the clouds, and the angels shall be sent down, descending in ranks.
(25:26) The true kingship on that day belongs to the Most Gracious
(25:26) On that Day, true sovereignty will belong to the Merciful, and it will be a difficult Day for the disbelievers.
Ahmed Raza Khan
(25:26) The true kingship on that day belongs to the Most Gracious; and that is hard for the disbelievers.
(25:26) true sovereignty on that Day will belong to the Gracious One, and it will be a hard Day for those who deny the truth.
(25:26) The sovereignty on that Day will be the true (sovereignty) of the Most Gracious, and it will be a hard Day for the disbelievers.
Ali Quli Qarai
(25:26) on that day true sovereignty will belong to the All-beneficent, and it will be a hard day for the faithless.
Hasan al-Fatih Qaribullah and Ahmad Darwish
(25:26) the true Kingdom on that Day shall belong to the Merciful a harsh day for the unbelievers.
That is translated surah Al Furqan ayat 26 (QS 25: 26) in arabic and english text, may be useful.