2 verses have
“éternellement”
in Edition Muhammad Hamidullah / Al-Muminoon (The Believers)
23:11qui hériteront le Paradis pour y demeurer éternellement.
23:103et ceux dont la balance est légère seront ceux qui ont ruiné leurs propres âmes et ils demeureront éternellement dans l'Enfer.
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Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274