Not necessarily true in that part, "
When Ar-Adûnakhôr succeeded his father, however, he was the first King to break with tradition and took his title in
Adûnaic.
[4][1] Tar-Herunúmen, a name in
Quenya was still recorded in the Scroll of Kings, because the kings feared that a break with this ancient custom could cause evil to befall.
[5][1]
His names were perceived as blasphemous and ill-omened
[4] by the
Faithful Númenóreans, because they mean "Lord of the West", a title that the Faithful only used for one of the
Valar, especially
Manwë.
[1]
During his reign the Elven-tongues were no longer used, nor permitted to be taught, but were maintained in secret by the Faithful. After that elven ships from
Tol Eressëa only came seldom and secretly to the west shores of Númenor." Anf as well their were times when they still came even after this, though by far less in number and definitely in secret, " Ar-Gimilzôr was a great enemy of the
Faithful. He completely outlawed the use of the
Elven tongues. In addition, he did not permit the Eldar to come to Númenor and punished those who still welcomed the Elven ships
[1] that came from Eressëa, that still came secretly to the western shores of Númenor where most of the Faithful lived, because he considered these Elves to be the "spies of the
Valar" and hoped to keep his deeds and counsels hidden from the Valar. Eventually, Ar-Gimilzôr's distrust of the Faithful caused him to exile all the Faithful that he could identify to the east of Númenor near the haven of
Rómenna. There he kept them under surveillance." By this point though, no more ships of the elves came, so while I'm not disagreeing with the sentiment, it is not "technically" fully accurate, so just a heads up.