I don't care about MTL. Some are real good, but a translation without text wrapping is really not good.
rename DLsite_AutoWrapText.js.txt to DLsite_AutoWrapText.js, then copy DLsite_AutoWrapText.js plugin to the game's js\plugins folder, then modify the plugins.js file under the js folder and add the following line:
{"name":"DLsite_AutoWrapText","status":true,"description":"メッセージテキストがウィンドウ幅を超える時、自動的に改行する。","parameters":{"ignoreChars":"[\"、\", \"。\", \",\", \".\", \"!\", \"?\", \"!\", \"?\", \"”\", \"’\", \")\", \"】\"]","margin":"0.00"}}
hope this solves the issue.