Hmm, I think the bot works well for subs that are mainly a content feed so losing the comments isn't a big deal (like eg. r/EarthPorn). But with r/Czech there is quite a lot of discussion so I'm not sure if reposting just the posts and losing the comments makes sense. I really don't gaf about Reddot's TOS, the thing I was ethically unsure about was if flooding Lemmy with Reddit reposts (ie. creating 'fake activity') wouldn't be detrimental. But with !100yearsago@sh.itjust.works it seems to be going well.
Also yes I am Czech (I can also speak a bit of German like you do).