Which logs, there are several.
The installation window allows me to choose English, there's also a check box somewhere in the setup that I can uncheck Polish, I did that. I've removed the modpack or I'd post a screen pic.
Anyway, I installed Webiums, it at least gives me an English modpack, thanks for your trouble. :P
I don't know what I could do wrong, I downloaded the pack from this forum, the initial installation window said English but once installed the WoT client's text was all in another language in all parts of the client.
Here's both of the logs in a zip.
https://www.dropbox.com/s/1td0u1f71q5hrkc/Aslain_Logs.zip?dl=0