diff --git a/ext/js/language/language-descriptors.js b/ext/js/language/language-descriptors.js
index 8b4f91549..8704a7fb4 100644
--- a/ext/js/language/language-descriptors.js
+++ b/ext/js/language/language-descriptors.js
@@ -124,6 +124,13 @@ const languageDescriptors = [
         textPreprocessors: capitalizationPreprocessors,
         languageTransforms: spanishTransforms,
     },
+    {
+        iso: 'et',
+        iso639_3: 'est',
+        name: 'Estonian',
+        exampleText: 'lugema',
+        textPreprocessors: capitalizationPreprocessors,
+    },
     {
         iso: 'fa',
         iso639_3: 'fas',
diff --git a/types/ext/language-descriptors.d.ts b/types/ext/language-descriptors.d.ts
index c5e09ae42..5e0513c3f 100644
--- a/types/ext/language-descriptors.d.ts
+++ b/types/ext/language-descriptors.d.ts
@@ -99,6 +99,9 @@ type AllTextProcessors = {
     es: {
         pre: CapitalizationPreprocessors;
     };
+    et: {
+        pre: CapitalizationPreprocessors;
+    };
     fa: {
         pre: {
             removeArabicScriptDiacritics: TextProcessor<boolean>;