There seems to be some form of issue actually.
"přemýšlel a hledal v mapě" has become one word for example. We will look into it.
A fix has been made and we will deploy it soon. The new result for this log will be 606.
It was a UTF8 issue. Since your language has so many accent characters it got a bit confused and thought it was garbage. Not for the characters themselves, but because it sometimes broke one character into two much weirder characters. The reason is a bit techy, but these characters are represented by more than one byte. If one the splits between them, it becomes two completely different characters.
Next problem then. We will have to start over with calculating log lengths. It will take over a week to catch up to where we are now. We had done about 30% this far, and now it's back to zero.
Regardless of that. I am very happy that you could post a good example log of where it actually went very wrong.