Apokatástasis

Apocatastasis (/æpoʊkəˈtæstəsɪs/) comes from the Greek word ἀποκατάστασις (apokatástasis) which means reconstitution or restitution. Acts 3:21 speaks of apocatastasis of all things, and although this passage is usually not understood to teach universal salvation, the word apocatastasis is typically used to refer to the belief that everyone – including the damned in hell and the devil – will ultimately be saved

The Vulgate translation of apokatastasis, “in tempora restitutionis omnium quae locutus est Deus” (the restitution of all things of which God has spoken) was taken up by Luther to mean the day of the restitution of the creation, but in Luther’s theology the day of restitution was also the day of resurrection and judgment, not the restitution of the wicked. In Luther’s Bible he rendered the Greek apokatastasis with the German herwiedergebracht werde; “will be brought back.” This sense continued to be used in Lutheran sermons.

Martin Luther explicitly disowned belief that the devils would ultimately reach blessedness.

references:

1. https://churchlifejournal.nd.edu/articles/the-severity-of-universal-salvation/
2. https://en.wikipedia.org/wiki/Origen