ough translation of the part at the end (after the dialogue). again, i tried ;w;
逃げ回ってたら偶然王様を守る形になったらしく王様にめっちゃ感謝されてるセッケ After running away, Sekke coincidentally ended up [seemingly?] protecting the king, who is extremely grateful.
そこを反王政派が白夜の魔眼の仕業に見せて王様を殺そうと狙うがキーラ家のダムナティオが阻止する ダムナティオ The anti-royals try to show the king [something about Eye of the Midnight Sun and trying to kill the king], but the Kira family and [it says “damunaito”, which I’m guessing is a name?] block the attack.
「この反応…ついに現れたな…王家の正義の下に必ず断罪してやる悪魔憑きめ」 “This reaction... finally... the royal family will see the absolute truth of the demon sword!” - Asta [idrk about this one, it says something about the royal family, justice and the demon sword? This is mostly an educated guess]
Edit 2: here's the rest from, uwuhd:
very unsure about the heart kingdom part so don't quote me, but here's the final part of the spoilers at last :''D
アスタの力は悪魔の力で、黒い角は人間が禁術の領域に踏み込み 違う世界と通じた証でヴェーグと呼ばれてる呪い 悪魔はそこの住人と言われている 500年前悪魔を封じた事を説明するセクレ。 Asta’s power is the demon’s. The black horns are [something] forbidden for humans to deal with [possibly referring to demonic power]. It appears a curse called “vegu” [literal transcription] from another world [likely the demon world] has broken out [basically the curse now exists in the human world too], and it’s said a demon dwells within it. Secre explains the demon was sealed 500 years ago.
今はネロの姿と切り替え自由 Secre can now freely take the form of Nero [probably means she can switch between human and bird, but it doesn’t say so directly].
クローバー王国の周囲には3つの国があり 魔導学者によって強力な軍隊を擁する侵略国家ダイヤモンド 豊かな自然の魔をそのまま受け入れ適応することで独自の魔法を極めた姿を見せぬ中立国秘境国家ハート 極寒の大地に眠る古の災いを従え覇を為さんとする謎多き冬の国魔神国家スペード The Clover Kingdom is surrounded by 3 other countries. Thanks to a scholar mage [likely referring to Morris], the Diamond Kingdom has a very powerful military force and invades [other] countries [a lot]. The Heart Kingdom is a unique, neutral nation with a lot of natural magic. They accept and adapt to the magic as it is. [the last sentance could say either “they do not show their own magic” or “it is a secluded/unexplored region”, I’m really not sure; also the word 魔 was used in the beginning, which could indicate something more sinister than just magic]. A mysterious, cold, country, the Spade Kingdom has an ancient calamity that sleeping within it.