why the dev hasn't respond

[Lyaha]

That's why they're active in the JP forums. Threads tend to be constructive in general. They also know how to have one big thread of X problem instead of snowflakes who think their new thread about the same problem will get more attention.

Then they should have those lines translated and posted here.

I'm getting sick and tired from the Japanese folks getting favoritism on everything, like the live letters, that's ignoring 70% if not more of the player base by not even providing a translator.