What do you get from reading
On the Use of Translations of the Qur’an at Mumineen.org Archive if anything? It gives the reason why a translation is worthless as far as worship or merit is concerned.
I expect, for someone of that mindset, a translation is a diversion from correct behaviour and someone distributing a translation is a stumbling block to those they misguide.
The bit about "Whoever reads a letter of the Book of Allah will be credited with a good deed" isn't in the Quran, it's among the authenticated sayings of his followers which are taken as instructions to the faithful.