diff --git a/src/app/strings.ts b/src/app/strings.ts
index a6ca68a..0d2075f 100644
--- a/src/app/strings.ts
+++ b/src/app/strings.ts
@@ -15,15 +15,15 @@ export const strings = Object.freeze({
     editContact: 'edit contact',
     editContactSuccessNotification: 'contact edited successfully',
     editTheContact: 'edit the contact',
-    errorMessageMaxLength: (maxLen: number) => `Must be ${maxLen} characters or fewer.`,
-    errorMessagePhonePattern: `Valid format: + (optional) plus 12 to 15 digits`,
-    errorMessageRequired: 'This field is required.',
-    errorNotification: 'Oops, there was an error',
+    errorMessageMaxLength: (maxLen: number) => `must be ${maxLen} characters or fewer`,
+    errorMessagePhonePattern: `valid format: + (optional) plus 12 to 15 digits`,
+    errorMessageRequired: 'this field is required.',
+    errorNotification: 'oops, there was an error',
     goBack: 'go back',
     name: 'name',
     phone: 'phone',
     save: 'save',
-    searchContactPlaceholder: 'Search contact...',
+    searchContactPlaceholder: 'search contact...',
   },
   es: {
     actions: 'acciones',
@@ -41,8 +41,8 @@ export const strings = Object.freeze({
     editContact: 'editar contacto',
     editContactSuccessNotification: 'contacto editado correctamente',
     editTheContact: 'edite el contacto. ',
-    errorMessageMaxLength: (maxLen: number) => `Debe contener ${maxLen} caracteres or menos.`,
-    errorMessagePhonePattern: `Formato: + (opcional) y 12 a 15 digitos`,
+    errorMessageMaxLength: (maxLen: number) => `debe contener ${maxLen} caracteres or menos`,
+    errorMessagePhonePattern: `formato: + (opcional) y 12 a 15 digitos`,
     errorMessageRequired: 'este campo es requerido.',
     errorNotification: 'hubo un error',
     goBack: 'volver',