This is a corpus of parallel sentences extracted from Wikipedia by Krzysztof Wołk and Krzysztof Marasek.
Tha dataset contains 20 languages and 36 bitexts.
To load a language pair which isn't part of the config, all you need to do is specify the language code as pairs,
e.g.
dataset = load_dataset("opus_wikipedia", lang1="it", lang2="pl")