Please make it available in Japanese. Poe2 is a popular game in Japan too. 
I know its asking a lot but running the game in english would probably be a solution for now. Getting someone to port everything to japanese is a huge task and would require someone bilingual.
Yes, if you run your game in english to run the bot, it will work. Then simply switch the game back to japanese when you want to play yourself. It is planned on the long run to make the bot able to work with the game in any language, but we have no ETA.