---
title: KM020A5: WARN_LanguageHeadersDeprecatedInKeyman10
---

|            |           |
|------------|---------- |
| Message    | This language header has been deprecated in Keyman 10\. Instead, add language metadata in the package file |
| Module     | [kmc-kmn.KmnCompilerMessages](kmc-kmn.kmncompilermessages) |
| Identifier | `WARN_LanguageHeadersDeprecatedInKeyman10` |