Editing Parallel text (section)

==Types of parallel corpora==

Parallel corpora can be classified into four main categories:{{Citation needed|date=February 2021}}
* A ''parallel corpus'' contains translations of the same document in two or more languages, aligned at least at the sentence level. These tend to be rarer than less-comparable corpora.{{Citation needed|date=February 2021}}
* A ''noisy parallel corpus'' contains bilingual sentences that are not perfectly aligned or have poor quality translations. Nevertheless, most of its contents are bilingual translations of a specific document.
* A ''comparable corpus'' is built from non-sentence-aligned and untranslated bilingual documents, but the documents are topic-aligned.
* A ''quasi-comparable corpus'' includes very heterogeneous and non-parallel bilingual documents that may or may not be topic-aligned.