GDScript/C#: Tweak error message for invalid script type for object

See #66870.

modules/gdscript/gdscript.cpp

@@ -396,9 +396,9 @@ ScriptInstance *GDScript::instance_create(Object *p_this) {
 	if (top->native.is_valid()) {
 		if (!ClassDB::is_parent_class(p_this->get_class_name(), top->native->get_name())) {
 			if (EngineDebugger::is_active()) {
-				GDScriptLanguage::get_singleton()->debug_break_parse(_get_debug_path(), 1, "Script inherits from native type '" + String(top->native->get_name()) + "', so it can't be instantiated in object of type: '" + p_this->get_class() + "'");
+				GDScriptLanguage::get_singleton()->debug_break_parse(_get_debug_path(), 1, "Script inherits from native type '" + String(top->native->get_name()) + "', so it can't be assigned to an object of type: '" + p_this->get_class() + "'");
 			}
-			ERR_FAIL_V_MSG(nullptr, "Script inherits from native type '" + String(top->native->get_name()) + "', so it can't be instantiated in object of type '" + p_this->get_class() + "'" + ".");
+			ERR_FAIL_V_MSG(nullptr, "Script inherits from native type '" + String(top->native->get_name()) + "', so it can't be assigned to an object of type '" + p_this->get_class() + "'" + ".");
 		}
 	}
 

modules/mono/csharp_script.cpp

@@ -2398,9 +2398,9 @@ ScriptInstance *CSharpScript::instance_create(Object *p_this) {
 		if (EngineDebugger::is_active()) {
 			CSharpLanguage::get_singleton()->debug_break_parse(get_path(), 0,
 					"Script inherits from native type '" + String(native_name) +
-							"', so it can't be instantiated in object of type: '" + p_this->get_class() + "'");
+							"', so it can't be assigned to an object of type: '" + p_this->get_class() + "'");
 		}
-		ERR_FAIL_V_MSG(nullptr, "Script inherits from native type '" + String(native_name) + "', so it can't be instantiated in object of type: '" + p_this->get_class() + "'.");
+		ERR_FAIL_V_MSG(nullptr, "Script inherits from native type '" + String(native_name) + "', so it can't be assigned to an object of type: '" + p_this->get_class() + "'.");
 	}
 
 	Callable::CallError unchecked_error;