diff --git a/bot.go b/bot.go
index a808480..1d128ec 100644
--- a/bot.go
+++ b/bot.go
@@ -85,7 +85,7 @@ func logMiddleware(next tele.HandlerFunc) tele.HandlerFunc {
 	return func(c tele.Context) error {
 		upd := c.Update()
 		defer func() {
-			logger.Infow("Log middleware", "update", upd)
+			logger.Debugw("Log middleware", "update", upd)
 		}()
 
 		return next(c)
diff --git a/botcmd_translate.go b/botcmd_translate.go
index 82a38b2..e83e49f 100644
--- a/botcmd_translate.go
+++ b/botcmd_translate.go
@@ -4,6 +4,7 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/samber/lo"
 	tele "gopkg.in/telebot.v3"
 
 	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/openai"
@@ -48,7 +49,6 @@ func handleTranslateCmd(c tele.Context) error {
 			tele.Silent,
 		)
 	}
-	logger.Infof("trimmed message: %q", payload)
 
 	_, err := c.Bot().Reply(msg, "Sure. To what language?", tele.Silent, translateMenu)
 	return err
@@ -91,6 +91,7 @@ func handleTranslateBtn(c tele.Context) error {
 				Content: payload,
 			},
 		},
+		Temperature: lo.ToPtr(0.6),
 	}
 
 	resp, err := ai.ChatCompletion(req)
diff --git a/cfg.go b/cfg.go
index 15a34e4..ce9efca 100644
--- a/cfg.go
+++ b/cfg.go
@@ -10,6 +10,7 @@ import (
 )
 
 type ConfigDef struct {
+	LogLevel           string  `env:"TG_LOG_LEVEL" env-default:"info"`
 	AdminUIDs          []int64 `env:"TG_ADMIN_UIDS"`
 	TGBotToken         string  `env:"TG_TOKEN" env-required:""`
 	TGAnnounceCommands bool    `env:"TG_ANNOUNCE_CMDS"`
diff --git a/main.go b/main.go
index d8fab53..94df370 100644
--- a/main.go
+++ b/main.go
@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 	tele "gopkg.in/telebot.v3"
 
 	"git.gensokyo.cafe/kkyy/mycurrencynet"
@@ -14,9 +15,13 @@ import (
 )
 
 var logger *zap.SugaredLogger
+var loglvl zap.AtomicLevel
 
 func initLogger() {
-	l, err := zap.NewProduction()
+	logCfg := zap.NewProductionConfig()
+	loglvl = logCfg.Level
+
+	l, err := logCfg.Build()
 	if err != nil {
 		panic(err)
 	}
@@ -89,6 +94,12 @@ func main() {
 	if err := LoadCfg(); err != nil {
 		logger.Fatalw("Failed to load config", "err", err)
 	}
+	parsedLvl, err := zapcore.ParseLevel(config.LogLevel)
+	if err != nil {
+		logger.Warnf("Invalid log level %q", config.LogLevel)
+	} else {
+		loglvl.SetLevel(parsedLvl)
+	}
 
 	runBot()
 }
diff --git a/openai/prompts/prompts.go b/openai/prompts/prompts.go
index 43f5ef5..d0e74df 100644
--- a/openai/prompts/prompts.go
+++ b/openai/prompts/prompts.go
@@ -1,6 +1,9 @@
 package prompts
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+)
 
 func General() string {
 	return "You are a helpful assistant."
@@ -8,7 +11,14 @@ func General() string {
 
 func Translate(targetLang string) string {
 	return fmt.Sprintf(
-		"You are a helpful assistant. Your task is to help translate the following text to %s. You should not interpret the text. You should structure the translated text to look natural in native %s, while keeping the meaning unchanged.",
-		targetLang, targetLang,
+		strings.Join([]string{
+			"You are a helpful assistant.",
+			"Your task is to help translate the text sent by the user into %s.",
+			"You should never interpret the user's text, but only translate it.",
+			"You should structure the translated text to sound natural in native %s while keeping the meanings unchanged.",
+			"If the user's text contains only a single word, please also add a brief explanation in %s, of the meaning of the original word.",
+			"The first text to be translated is:",
+		}, " \n"),
+		targetLang, targetLang, targetLang,
 	)
 }