Regarding the error on the first launch of the game, and after each clean installation:
I tried removing the Bulgarian language from the Angelslove-v0.14_IE-market\game\tl directory, but then I got an error message with Czech.
So, I removed all languages except English, and I still got an error message with English.
So I also removed English, and I didn't get an error message.
The solution that works is therefore to delete all the files in the Angelslove-v0.14_IE-market\game\tl directory.
But this doesn't solve the most important problem, which is that the dialogue language in the game is Russian.
It's stuck on Russian by default, and it's impossible to change it.