diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -82,3 +82,11 @@ python adn-server.py --echo -c adn-echo.yaml
 See [Echo (playback)](docs/en/server/user-guide/echo.md) in the docs site for an overview.
 
 **systemd:** example units in `examples/systemd/` (`adn-server.service`, `adn-echo.service`).
+
+## Acknowledgments
+
+Thanks to **[Esteban Mackay, HP3ICC](https://gitlab.com/hp3icc)**, for ideas, help, testing, and suggestions throughout development.
+
+---
+
+[Español](README_es.md)
diff --git a/README_es.md b/README_es.md
new file mode 100644
index 0000000..907f520
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@@ -0,0 +1,9 @@
+# ADN DMR Peer Server
+
+## Agradecimientos
+
+Gracias a **[Esteban Mackay, HP3ICC](https://gitlab.com/hp3icc)**, por las ideas, ayudas, pruebas y sugerencias a lo largo del desarrollo.
+
+---
+
+[English](README.md)