Abramo's forces have grown beyond the point where their morale is a part of their personal relationship with Abramo, and he will have to turn to the traditional means of army management: In a word, propaganda. It's a good problem to have; wars are not won by special-forces strike teams no matter how mythic. It's still a problem, though. He will make a start by translating into local idiom some of the more famous propaganda of his own world.
Mine eyes have seen the glory of Iomedae's long sword
She is triaging disaster in despite of Hell's foul Lord
She hath loosed Her mythic heroes on the vile Abyssal horde
Her army marches on!
Glory, glory, Iomedae! (3x)
Her army marches on!
I have seen Her in the Wardstones where they hold the demons back
Thus Her shield protects Her army while it readies to attack
She hath righteously triaged them to ruin and to wrack
Her army marches on!
Glory, glory...
I have read a Lawful gospel writ in burnished rows of steel:
"As ye deal with my alliance so with you my Law shall deal
Let my hero, born of woman, crush Deskari 'neath his heel
My army marches on!"
Glory, glory...
She hath sounded forth the trumpet that shall never call retreat
She defends the righteous fallen at Pharasma's judgment seat
Oh, be swift, my soul, to answer Her! Be jubilant, my feet!
Her army marches on!
Glory, glory...
Aroden born of Azlant died for glory over sea;
His Inheritor fights on with aid from mortals - you and me
Though this Age is not of Glory, let us live to make men free!
Our army marches on!
He is not vastly impressed with his own poetry in Taldane, but - it will serve. His soldiers are not very critical; it's good enough for a hundred men to sing while marching down a muddy Mendevian road with a battle at its end, and that's what matters.
Privately he is, actually, somewhat concerned at using the names of these 'gods', where the original had the Lord even if it was the heretical Christian version. But - the commandment is to have none before the Name; it does not actually say not to mention them at all. And anyway, are they even gods? They could just as well be very powerful aliens, using human mortal agents for their own reasons... Anyway he is doing this for the war effort, and practically everything is licit if it is to save a life; on that much, at least, he feels on firm ground. It will admittedly be hard to say exactly how many lives are saved by the morale effects of a good marching song; it's one of those want-of-a-nail things with a small probability of a large effect. If some particular soldier feels just enough braver that he doesn't turn and flee, and so does not trigger a rout, and does not collapse a flank, and does not lose a battle, and does not destroy an army in the retreat... that could be very many lives indeed. But he will never know.
At any rate he is not worshipping Iomedae, just singing about her. There is no commandment against song.