[methou]

I can't say for en <-> de, I can read both without problem. But for Japanese DeepL is much better, often times the tone from gpt4 are little bit "rude"/direct or "weird" in en to jp, deepl is as good as an example sentence they would put into a textbook. For jp to en, most gpt4 or any llm is much superior, because you can ask follow up questions on certain slangs, or anything that's not very clear.