I've been reading about transformers & have been having some difficulty understanding the concept of alignment.
Based on this article
Alignment means matching segments of original text with their corresponding segments of the translation.
Does this mean that, with transformers, we're adding the fully translated sentences as inputs too? What's the purpose of alignment? How exactly do these models figure out how to match the different segments together? I'm pretty sure there's some underlying assumption/knowledge that I'm not fully getting -- but I'm not entirely sure what.