Jurgen Klopp's side have signed Henrikh Mkhitaryan, Sokratis Papastathopoulos and Pierre-Emerick Aubameyang in the close-season as they look to challenge Bayern Munich for the title in 2013-14.
"I think that during training we saw that the new guys have great qualities," Schmelzer told reporters. "If you look at Micky [Mkhitaryan] during training, he has some incredible movements, also Sokratis in the back is acting as if he'd been here for a few years already, and also Oba [Aubameyang] has great qualities.
"The new purchases are spot on, and like I've said, we are trying to integrate them into the team as well as we can, of course there are difficulties with the languages, but we have an interpreter and will manage somehow, and then at the beginning of the season the three will have adapted to our philosophy so that we can start the season successfully."
Schmelzer revealed that defender Papastathopoulos has eased in the quickest, with new mifielder Mkhitaryan not far behind, while he suspects that Aubameyang will come out of his shell soon.
"I think Micky is the one that is a bit more direct, he comes up to us, he is starting to say his first German words, even a few sentences, and I think it won't take long for him to speak his sixth language," the left-back added.
"It is easier to communicate with Sokratis, through his time at Bremen he learnt a bit of German and he also speaks English. Oba is a bit - well I guess shy is the wrong word - more reserved and he is having a look at the whole thing first. But if all three of them open up, Micky already has, then I think they are great guys that will fit into our team."