diff --git a/src/llamafactory/hparams/data_args.py b/src/llamafactory/hparams/data_args.py
index a33e6267..b841ec52 100644
--- a/src/llamafactory/hparams/data_args.py
+++ b/src/llamafactory/hparams/data_args.py
@@ -99,7 +99,7 @@ class DataArguments:
     )
     val_size: float = field(
         default=0.0,
-        metadata={"help": "Size of the development set, should be an integer or a float in range `[0,1)`."},
+        metadata={"help": "Size of the validation set, should be an integer or a float in range `[0,1)`."},
     )
     packing: Optional[bool] = field(
         default=None,
diff --git a/src/llamafactory/webui/locales.py b/src/llamafactory/webui/locales.py
index 51662092..b8940d9d 100644
--- a/src/llamafactory/webui/locales.py
+++ b/src/llamafactory/webui/locales.py
@@ -468,7 +468,7 @@ LOCALES = {
     "val_size": {
         "en": {
             "label": "Val size",
-            "info": "Proportion of data in the dev set.",
+            "info": "Percentage of validation set from the entire dataset.",
         },
         "ru": {
             "label": "Размер валидации",