are any other languages planed?

All attributed to Sennin:-
From the FAQ, dated 2021:
"Will The Iron Oath be available in other languages
Due to our word count, localization is not something we're able to pursue right now. We do hope we'll have the means to do it in the future, but we can't make any promises and will ultimately depend on the success of the game."

From the Steam forums:
"27 Oct, 2023 @ 9:01pm
No plans for any other languages right now, though we'd definitely like to localize in the future to at least a few more. Our wound count is very high (and always getting higher with each update) so it's quite costly to do unfortunately. Hopefully the game does well enough where it becomes an option for us :)."

From Discord, 12/05/2024:
Ya we're near 200k words and will be over that soon enough. So we wouldnt want to be using it [AI translation tools] for an extended period of time. If we can AI translate and then get professional editors to fix any issues it would probably still be much cheaper than doing a traditional translation (which atm I think would be around 10-15k per language so its a bit much to stomach overall!) (edited)

Seems like the answer has been, and continues to be, that the developers desire to have multiple translations done, but they are exceedingly costly for such a small studio. Considering that the developers are still adding new content, thus increasing the length of a changing script, and that the Roadmap (up to Q2 2024) has no mention of language updates, it is safe to not place your bets on receiving any further languages. If it is to come, it will come eventually.