I have translated the DevDmBootstrap3 theme to Spanish, but it seems like some lines are missing. I mean, they are there, but in English. The issue seems to be in the text domain that has some typos in those lines.
They have devdmbooststrap3 instead of devdmbootstrap3
template-part-postmeta.php line 6
comments.php line 6
index.php line 54