Meanwhile, why don't you try to get RW to fix it. It's been broken since the launch of the zone.
We have a long, looong list of bugs that RW needs to fix. If it's been reported as broken, then it has already been put on that list and we're at the mercy of RW to fix it eventually.
But Google translate handles it better than Russian and English. Honest. I'm not saying he should try to use Russian on the Polish forum. He should put his stuff into Google Translate in Russian, get the Polish translation, and copy it into the Polish forum, then use Translate to convert the answers to English.
And English isn't a Germanic language. It's roughly 25%Celtic, 45% Romance and only 30% Germanic.
At its base, English is a Germanic language. It has taken on a lot from the Celts that were there before them and the Romans and French.
Having tried out Google or Deepl translations of Russian into multiple languages, none of these have impressed me very much.
Regarding the actual question:
many cooking/potion quests require you to interrupt the cast bar at a specific point (usually around 70%)
That sounds kinda familiar for that one too
That should be the solution