I DO know it's because my Japanese writing on social media is pure rough conversational form with various unique vocabs.
I tend to play the words, love to coin words. Plus my expression tends to be verbose - in any languages.

Well, however so, on social media, I'll keep writing like this in any languages. This way of writing and thinking is exactly what I am rather than how I am actually viewed in the offline world.

Just tried to translate my own post written in JP into EN. Accuracy seems mostly 60-75% or so...?
But mistranslated part is seriously terrible. Sometimes to completely opposite meanings. 🤦‍♀️
It's DeepL here though, for conversational JP, gTranslate is SLIGHTLY better mostly, imo.
However mistranslated part is bad as DeepL 😂