diff --git a/docs/src/pages/guides/localization/localization.md b/docs/src/pages/guides/localization/localization.md
index 151adda47b7fb8..6dfcddf8a440ef 100644
--- a/docs/src/pages/guides/localization/localization.md
+++ b/docs/src/pages/guides/localization/localization.md
@@ -29,7 +29,7 @@ const theme = createMuiTheme({
 |:-------|:---------|:---------|
 | Azerbaijani | az-AZ | `azAZ` |
 | Chinese (Simplified) | zh-CN | `zhCN` |
-| Czech | cs-CZ | `csCz` |
+| Czech | cs-CZ | `csCZ` |
 | Dutch | nl-NL | `nlNL` |
 | English (United States) | en-US | `enUS` |
 | French | fr-FR | `frFR` |