During on-wiki discussions for T314635 and T314636, it was mentioned that talk namespaces in general should have a different translation than the ones currently used. Following this, it was brought up at the Igbo Wikipedia village pump (link) by @Tochiprecious (of the Igbo Wikimedians User Group), and the consensus is that the talk namespace names should be changed.
I will upload a patch to amend them shortly, of course keeping the old names as aliases.