Few are familiar with the works of Methodius of Olympus. He is an Ante-Nicene Fathers whose works are hard to access. Most were not translated into English as part of the Ante-Nicene Fathers, because they are preserved mainly in Old Slavonic. Only one large work was translated in the ANF series, the Symposium, because that exists in Greek. I have listed his works here, with a bibliography.
Thanks to a correspondent, I have today become aware that all three of the major works have been translated into Italian! This should be of use, if only because Italian is handled quite well by Google Translate.
On the downside, it seems that translations into Italian are rarely stocked by reference libraries in the US and UK. But all three are in print. So if you want them, you can purchase them. I see that Italian site IBS.it has them all here. Just search for “metodio di olimpo”.
In case that link disappears, here are the details:
On Free-Will – R. Franchi, Metodio di Olimpo: Il libero arbitrio, Paoline Editoriale Libri, 2015. 448p. Series: Letture cristiane del primo millennio. ISBN 9788831546690. €39. (22 sample pages at the publisher site here). Facing pages of Greek/Slavonic and Italian.
Symposium – N. Antoniono, Metodio di Olimpo: La verginità, Città Nuova, 2000. 200p. Series: Testi patristici. ISBN 9788831131520. €20. (Google Books preview here).
On the Resurrection – M. Miroslaw & B.Zorzi, Metodio di Olimpo: La risurrezione, Città Nuova, 2010. 296p. Series: Testi patristici. ISBN 9788831182164. €30.
Useful stuff! (The minor works are all now available online in English at Archive.org, of course).