Sorry for asking again. I didn't pay much attention when you mentioned me the last time. By update, did you mean we just replace the previous year's post with the new changes?
Yes.
Or do we make a separate post/translation? Like BCA 2025 edition?
No.
I am only asking this because we don't have any local boards yet (the Bangla community). So I won't be able to bump my previous year's BCA 2024 translation or anything of the sort. I don't know how! Honestly, I'm a little confused here...

Well... this is a particular situation, since you don't have a local board... sigh... But what you can do is to edit your translation... add the new content... Then simply quote your old translation (by making a new post) and write in that post something like BCA 2024 was just launched... please read the quoted post (which contains your translation).
At first I thought the same as you did, that it's a separate post. But when I realize the message said "update" that's when I started having doubts. Furthermore, porf didn't add the topic in "Translation in progress" which made my doubts more.
Porf did not add the topic to translations in progress because it was already in the "Finished" section:
The topic
is already translated in at least 10 languages... so there is no need to add it to "In progress" section. It's only needed that the translators to update their existing translations.
(Don't be offended with my sarcastic response, you know I have always been like this, I like to joke around whenever I can..)
No worries

I have a great sense of humor!