diff --git a/examples/docs/en-US/i18n.md b/examples/docs/en-US/i18n.md
index 79f7e4cab..646202721 100644
--- a/examples/docs/en-US/i18n.md
+++ b/examples/docs/en-US/i18n.md
@@ -197,7 +197,7 @@ Currently Element ships with the following languages:
   <li>Greek (el)</li>
   <li>Slovak (sk)</li>
   <li>Catalunya (ca)</li>
-  <li>Czech (cz)</li>
+  <li>Czech (cs-CZ)</li>
   <li>Ukrainian (ua)</li>
   <li>Turkmen (tk)</li>
   <li>Tamil (ta)</li>
diff --git a/examples/docs/es/i18n.md b/examples/docs/es/i18n.md
index 4a8b1a9c5..65376028d 100644
--- a/examples/docs/es/i18n.md
+++ b/examples/docs/es/i18n.md
@@ -197,7 +197,7 @@ Actualmente Element está disponible en los siguientes idiomas:
   <li>Greek (el)</li>
   <li>Slovak (sk)</li>
   <li>Catalunya (ca)</li>
-  <li>Czech (cz)</li>
+  <li>Czech (cs-CZ)</li>
   <li>Ukrainian (ua)</li>
   <li>Turkmen (tk)</li>
   <li>Tamil (ta)</li>
diff --git a/examples/docs/zh-CN/i18n.md b/examples/docs/zh-CN/i18n.md
index 93ff81265..0e75f045d 100644
--- a/examples/docs/zh-CN/i18n.md
+++ b/examples/docs/zh-CN/i18n.md
@@ -209,7 +209,7 @@ ElementLocale.i18n((key, value) => i18n.t(key, value))
   <li>希腊语（el）</li>
   <li>斯洛伐克语（sk）</li>
   <li>加泰罗尼亚语（ca）</li>
-  <li>捷克语（cz）</li>
+  <li>捷克语（cs-CZ）</li>
   <li>乌克兰语（ua）</li>
   <li>土库曼语（tk）</li>
   <li>泰米尔语（ta）</li>
diff --git a/src/locale/lang/cz.js b/src/locale/lang/cs-CZ.js
similarity index 100%
rename from src/locale/lang/cz.js
rename to src/locale/lang/cs-CZ.js