Update errors.go (#975)

**fix for aliases**
translate work incorrect for registered aliases

## Fixes Or Enhances


**Make sure that you've checked the boxes below before you submit PR:**
- [x] Tests exist or have been written that cover this particular
change.

@go-playground/validator-maintainers

errors.go

@@ -257,15 +257,19 @@ func (fe *fieldError) Error() string {
 // NOTE: if no registered translation can be found, it returns the original
 // untranslated error message.
 func (fe *fieldError) Translate(ut ut.Translator) string {
+	var fn TranslationFunc
 
 	m, ok := fe.v.transTagFunc[ut]
 	if !ok {
 		return fe.Error()
 	}
 
-	fn, ok := m[fe.tag]
+	fn, ok = m[fe.tag]
 	if !ok {
-		return fe.Error()
+		fn, ok = m[fe.actualTag]
+		if !ok {
+			return fe.Error()
+		}
 	}
 
 	return fn(ut, fe)