diff --git a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
index ad076a1bd42..7870b9b7d26 100644
--- a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -9710,6 +9710,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Private_identifiers_are_only_allowed_in_class_bodies_and_may_only_be_used_as_part_of_a_class_member__1451" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Private identifiers are only allowed in class bodies and may only be used as part of a class member declaration, property access, or on the left-hand-side of an 'in' expression]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Identificadores privados são permitidos apenas em corpos de classe e só podem ser usados como parte de uma declaração de membro de classe, acesso de propriedade ou no lado esquerdo de uma expressão 'em']]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Private_identifiers_are_only_available_when_targeting_ECMAScript_2015_and_higher_18028" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Private identifiers are only available when targeting ECMAScript 2015 and higher.]]></Val>
@@ -12665,11 +12674,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_left_hand_side_of_an_in_expression_must_be_a_private_identifier_or_of_type_any_string_number_or__2360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'.]]></Val>
+          <Val><![CDATA[The left-hand side of an 'in' expression must be a private identifier or of type 'any', 'string', 'number', or 'symbol'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[O lado esquerdo de uma expressão 'in' deve ser do tipo 'any', 'string', 'number' ou 'symbol'.]]></Val>
+            <Val><![CDATA[O lado esquerdo de uma expressão 'em' deve ser um identificador privado ou do tipo 'qualquer', 'cadeia de caracteres', 'número' ou 'símbolo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
diff --git a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
index bd212cc160c..3d7664d0876 100644
--- a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -9719,6 +9719,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Private_identifiers_are_only_allowed_in_class_bodies_and_may_only_be_used_as_part_of_a_class_member__1451" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Private identifiers are only allowed in class bodies and may only be used as part of a class member declaration, property access, or on the left-hand-side of an 'in' expression]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Закрытые идентификаторы разрешены только в теле класса и могут использоваться только как часть объявления члена класса, доступа к свойствам или левой стороны выражения "in"]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Private_identifiers_are_only_available_when_targeting_ECMAScript_2015_and_higher_18028" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Private identifiers are only available when targeting ECMAScript 2015 and higher.]]></Val>
@@ -12674,11 +12683,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_left_hand_side_of_an_in_expression_must_be_a_private_identifier_or_of_type_any_string_number_or__2360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'.]]></Val>
+          <Val><![CDATA[The left-hand side of an 'in' expression must be a private identifier or of type 'any', 'string', 'number', or 'symbol'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Левый операнд выражения in должен иметь тип any, string, number или Symbol.]]></Val>
+            <Val><![CDATA[Левый операнд выражения "in" должен быть закрытым идентификатором или иметь тип any, string, number или symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />