diff --git a/src/lib/mobx-form/form-has-error.test.ts b/src/lib/mobx-form/form-has-error.test.ts
index 431a2978..61c58427 100644
--- a/src/lib/mobx-form/form-has-error.test.ts
+++ b/src/lib/mobx-form/form-has-error.test.ts
@@ -8,6 +8,8 @@ import {
 } from "./form-has-error.ts";
 import { validators } from "./validator.ts";
 
+const isRequiredMessage = 'is required';
+
 test("isFormTouchedAndHasError", () => {
   const f1 = {
     a: new TextField("a"),
@@ -24,8 +26,8 @@ test("isFormTouchedAndHasError", () => {
   ).toBeTruthy();
 
   const f2 = {
-    a: new TextField("a", validators.required()),
-    b: [new TextField("b", validators.required()), new TextField("d")],
+    a: new TextField("a", validators.required(isRequiredMessage)),
+    b: [new TextField("b", validators.required(isRequiredMessage)), new TextField("d")],
   };
 
   f2.a.touch();
@@ -49,8 +51,8 @@ test("isFormTouchedAndHasError", () => {
 
 test("is form dirty", () => {
   const f = {
-    a: new TextField("a", validators.required()),
-    b: [new TextField("b", validators.required()), new TextField("d")],
+    a: new TextField("a", validators.required(isRequiredMessage)),
+    b: [new TextField("b", validators.required(isRequiredMessage)), new TextField("d")],
   };
 
   expect(isFormTouched(f)).toBeFalsy();
@@ -61,7 +63,7 @@ test("is form dirty", () => {
 
 test("is form invalid by default", () => {
   const f = {
-    a: new TextField("", validators.required()),
+    a: new TextField("", validators.required(isRequiredMessage)),
   };
 
   expect(isFormValid(f)).toBeFalsy();
@@ -83,8 +85,8 @@ test("is boolean form dirty", () => {
 
 test("is form empty", () => {
   const f = {
-    a: new TextField("a", validators.required()),
-    b: [new TextField("b", validators.required()), new TextField("d")],
+    a: new TextField("a", validators.required(isRequiredMessage)),
+    b: [new TextField("b", validators.required(isRequiredMessage)), new TextField("d")],
   };
 
   expect(isFormEmpty(f)).toBeFalsy();
@@ -99,10 +101,10 @@ test("is form empty", () => {
 
 test("very nested form - only fields", () => {
   const f = {
-    a: new TextField("a", validators.required()),
+    a: new TextField("a", validators.required(isRequiredMessage)),
     b: {
       c: {
-        d: new TextField("d", validators.required()),
+        d: new TextField("d", validators.required(isRequiredMessage)),
       },
     },
   };
@@ -118,11 +120,11 @@ test("very nested form - only fields", () => {
 
 test("very nested form - any fields", () => {
   const f = {
-    a: new TextField("a", validators.required()),
+    a: new TextField("a", validators.required(isRequiredMessage)),
     num: 12,
     b: {
       c: {
-        d: new TextField("d", validators.required()),
+        d: new TextField("d", validators.required(isRequiredMessage)),
         k: null,
       },
     },
diff --git a/src/lib/mobx-form/validator.ts b/src/lib/mobx-form/validator.ts
index 3eec800f..55ac1e50 100644
--- a/src/lib/mobx-form/validator.ts
+++ b/src/lib/mobx-form/validator.ts
@@ -1,13 +1,11 @@
 // @ts-nocheck
-import { t } from "../../translations/t.ts";
 
 // https://codesandbox.io/s/github/final-form/react-final-form/tree/master/examples/field-level-validation?file=/index.js
 export const validators = {
   required:
-    (errorMessage = t("validation_required")) =>
+    (errorMessage) =>
     (value) =>
       value ? undefined : errorMessage,
-  number: (value) => (isNaN(value) ? t("validation_number") : undefined),
   all:
     (...validators) =>
     (value) =>
diff --git a/src/store/deck-form-store.test.ts b/src/store/deck-form-store.test.ts
index 68ee2abe..2e3967aa 100644
--- a/src/store/deck-form-store.test.ts
+++ b/src/store/deck-form-store.test.ts
@@ -118,6 +118,13 @@ vi.mock("../lib/telegram/show-alert.ts", () => {
   };
 });
 
+vi.mock("../translations/t.ts", () => {
+  return {
+    t: (val: string) => val,
+  };
+});
+
+
 vi.mock("../api/api.ts", () => {
   return {
     upsertDeckRequest: mocks.upsertDeckRequest,
diff --git a/src/store/deck-form-store.ts b/src/store/deck-form-store.ts
index bb8f2dda..90611edb 100644
--- a/src/store/deck-form-store.ts
+++ b/src/store/deck-form-store.ts
@@ -41,7 +41,7 @@ export const createDeckTitleField = (value: string) => {
 };
 
 export const createCardSideField = (value: string) => {
-  return new TextField(value, validators.required());
+  return new TextField(value, validators.required(t('validation_required')));
 };
 
 const createUpdateForm = (