diff --git a/docs/data/date-pickers/localization/data.json b/docs/data/date-pickers/localization/data.json
index e4f077b2a1f49..2adcf451219a4 100644
--- a/docs/data/date-pickers/localization/data.json
+++ b/docs/data/date-pickers/localization/data.json
@@ -1,4 +1,12 @@
 [
+  {
+    "languageTag": "eu",
+    "importName": "eu",
+    "localeName": "Basque",
+    "missingKeysCount": 0,
+    "totalKeysCount": 37,
+    "githubLink": "https://github.com/mui/mui-x/blob/master/packages/x-date-pickers/src/locales/eu.ts"
+  },
   {
     "languageTag": "be-BY",
     "importName": "beBY",
@@ -203,7 +211,7 @@
     "languageTag": "es-ES",
     "importName": "esES",
     "localeName": "Spanish",
-    "missingKeysCount": 1,
+    "missingKeysCount": 0,
     "totalKeysCount": 37,
     "githubLink": "https://github.com/mui/mui-x/blob/master/packages/x-date-pickers/src/locales/esES.ts"
   },
diff --git a/packages/x-date-pickers/src/locales/esES.ts b/packages/x-date-pickers/src/locales/esES.ts
index e4cbf8c416438..c355724c62c79 100644
--- a/packages/x-date-pickers/src/locales/esES.ts
+++ b/packages/x-date-pickers/src/locales/esES.ts
@@ -42,8 +42,8 @@ const esESPickers: Partial<PickersLocaleText<any>> = {
   clockLabelText: (view, time, adapter) =>
     `Seleccione ${views[view]}. ${
       time === null
-        ? 'Sin tiempo seleccionado'
-        : `El tiempo seleccionado es ${adapter.format(time, 'fullTime')}`
+        ? 'No hay hora seleccionada'
+        : `La hora seleccionada es ${adapter.format(time, 'fullTime')}`
     }`,
   hoursClockNumberText: (hours) => `${hours} horas`,
   minutesClockNumberText: (minutes) => `${minutes} minutos`,
@@ -61,17 +61,17 @@ const esESPickers: Partial<PickersLocaleText<any>> = {
   // Open picker labels
   openDatePickerDialogue: (value, utils) =>
     value !== null && utils.isValid(value)
-      ? `Elige la fecha, la fecha elegida es ${utils.format(value, 'fullDate')}`
-      : 'Elige la fecha',
+      ? `Elige fecha, la fecha elegida es ${utils.format(value, 'fullDate')}`
+      : 'Elige fecha',
   openTimePickerDialogue: (value, utils) =>
     value !== null && utils.isValid(value)
-      ? `Elige la hora, la hora elegido es ${utils.format(value, 'fullTime')}`
-      : 'Elige la hora',
-  // fieldClearLabel: 'Clear value',
+      ? `Elige hora, la hora elegida es ${utils.format(value, 'fullTime')}`
+      : 'Elige hora',
+  fieldClearLabel: 'Limpiar valor',
 
   // Table labels
-  timeTableLabel: 'elige la fecha',
-  dateTableLabel: 'elige la hora',
+  timeTableLabel: 'elige hora',
+  dateTableLabel: 'elige fecha',
 
   // Field section placeholders
   fieldYearPlaceholder: (params) => 'A'.repeat(params.digitAmount),
diff --git a/packages/x-date-pickers/src/locales/eu.ts b/packages/x-date-pickers/src/locales/eu.ts
new file mode 100644
index 0000000000000..d99e2febb7a18
--- /dev/null
+++ b/packages/x-date-pickers/src/locales/eu.ts
@@ -0,0 +1,87 @@
+import { PickersLocaleText } from './utils/pickersLocaleTextApi';
+import { getPickersLocalization } from './utils/getPickersLocalization';
+import { TimeViewWithMeridiem } from '../internals/models';
+
+const views: Record<TimeViewWithMeridiem, string> = {
+  hours: 'orduak',
+  minutes: 'minutuak',
+  seconds: 'segunduak',
+  meridiem: 'meridianoa',
+};
+
+const euPickers: Partial<PickersLocaleText<any>> = {
+  // Calendar navigation
+  previousMonth: 'Azken hilabetea',
+  nextMonth: 'Hurrengo hilabetea',
+
+  // View navigation
+  openPreviousView: 'azken bista ireki',
+  openNextView: 'hurrengo bista ireki',
+  calendarViewSwitchingButtonAriaLabel: (view) =>
+    view === 'year'
+      ? 'urteko bista irekita dago, aldatu egutegi bistara'
+      : 'egutegi bista irekita dago, aldatu urteko bistara',
+
+  // DateRange placeholders
+  start: 'Hasi',
+  end: 'Bukatu',
+
+  // Action bar
+  cancelButtonLabel: 'Utxi',
+  clearButtonLabel: 'Garbitu',
+  okButtonLabel: 'OK',
+  todayButtonLabel: 'Gaur',
+
+  // Toolbar titles
+  datePickerToolbarTitle: 'Data aukeratu',
+  dateTimePickerToolbarTitle: 'Data eta ordua aukeratu',
+  timePickerToolbarTitle: 'Ordua aukeratu',
+  dateRangePickerToolbarTitle: 'Data tartea aukeratu',
+
+  // Clock labels
+  clockLabelText: (view, time, adapter) =>
+    `Aukeratu ${views[view]}. ${
+      time === null
+        ? 'Ez da ordurik aukertau'
+        : `Aukeratutako ordua ${adapter.format(time, 'fullTime')} da`
+    }`,
+  hoursClockNumberText: (hours) => `${hours} ordu`,
+  minutesClockNumberText: (minutes) => `${minutes} minutu`,
+  secondsClockNumberText: (seconds) => `${seconds} segundu`,
+
+  // Digital clock labels
+  selectViewText: (view) => `Aukeratu ${views[view]}`,
+
+  // Calendar labels
+  calendarWeekNumberHeaderLabel: 'Astea zenbakia',
+  calendarWeekNumberHeaderText: '#',
+  calendarWeekNumberAriaLabelText: (weekNumber) => `${weekNumber} astea`,
+  calendarWeekNumberText: (weekNumber) => `${weekNumber}`,
+
+  // Open picker labels
+  openDatePickerDialogue: (value, utils) =>
+    value !== null && utils.isValid(value)
+      ? `Data aukeratu, aukeratutako data ${utils.format(value, 'fullDate')} da`
+      : 'Data aukeratu',
+  openTimePickerDialogue: (value, utils) =>
+    value !== null && utils.isValid(value)
+      ? `Ordua aukeratu, aukeratutako ordua ${utils.format(value, 'fullTime')} da`
+      : 'Ordua aukeratu',
+  fieldClearLabel: 'Balioa garbitu',
+
+  // Table labels
+  timeTableLabel: 'ordua aukeratu',
+  dateTableLabel: 'data aukeratu',
+
+  // Field section placeholders
+  fieldYearPlaceholder: (params) => 'Y'.repeat(params.digitAmount),
+  fieldMonthPlaceholder: (params) => (params.contentType === 'letter' ? 'MMMM' : 'MM'),
+  fieldDayPlaceholder: () => 'DD',
+  fieldWeekDayPlaceholder: (params) => (params.contentType === 'letter' ? 'EEEE' : 'EE'),
+  fieldHoursPlaceholder: () => 'hh',
+  fieldMinutesPlaceholder: () => 'mm',
+  fieldSecondsPlaceholder: () => 'ss',
+  fieldMeridiemPlaceholder: () => 'aa',
+};
+
+export const eu = getPickersLocalization(euPickers);
diff --git a/packages/x-date-pickers/src/locales/index.ts b/packages/x-date-pickers/src/locales/index.ts
index 610e3d41a476a..410f06361fae0 100644
--- a/packages/x-date-pickers/src/locales/index.ts
+++ b/packages/x-date-pickers/src/locales/index.ts
@@ -5,6 +5,7 @@ export * from './deDE';
 export * from './elGR';
 export * from './enUS';
 export * from './esES';
+export * from './eu';
 export * from './faIR';
 export * from './fiFI';
 export * from './frFR';
diff --git a/scripts/l10n.ts b/scripts/l10n.ts
index 932119f26b745..25e9d2ceaee18 100644
--- a/scripts/l10n.ts
+++ b/scripts/l10n.ts
@@ -67,7 +67,7 @@ function plugin(existingTranslations: Translations): babel.PluginObj {
           }
 
           // Test if the variable name follows the pattern xxXXGrid or xxXXPickers
-          if (!/[a-z]{2}[A-Z]{2}(Grid|Pickers)/.test(node.id.name)) {
+          if (!/[a-z]{2}[A-Z]{2}|[a-z]{2}(Grid|Pickers)/.test(node.id.name)) {
             visitorPath.skip();
             return;
           }
@@ -164,7 +164,7 @@ function extractTranslations(translationsPath: string): [TranslationsByGroup, Tr
 function findLocales(localesDirectory: string, constantsPath: string) {
   const items = fse.readdirSync(localesDirectory);
   const locales: any[] = [];
-  const localeRegex = /^[a-z]{2}[A-Z]{2}/;
+  const localeRegex = /^[a-z]{2}[A-Z]{2}|^[a-z]{2}(?=.ts)/;
 
   items.forEach((item) => {
     const match = item.match(localeRegex);
@@ -173,7 +173,10 @@ function findLocales(localesDirectory: string, constantsPath: string) {
     }
 
     const localePath = path.resolve(localesDirectory, item);
-    const code = match[0];
+    if (fse.lstatSync(localePath).isDirectory()) {
+      return;
+    }
+    const code = match[0] || match[1];
     if (constantsPath !== localePath) {
       // Ignore the locale used as a reference
       locales.push([localePath, code]);
@@ -321,9 +324,10 @@ const generateDocReport = async (
         return;
       }
 
-      const languageTag = `${importName.slice(0, 2).toLowerCase()}-${importName
-        .slice(2)
-        .toUpperCase()}`;
+      const languageTag =
+        importName.length > 2
+          ? `${importName.slice(0, 2).toLowerCase()}-${importName.slice(2).toUpperCase()}`
+          : importName;
       const localeName = localeNames[languageTag];
 
       if (localeName === undefined) {
diff --git a/scripts/localeNames.js b/scripts/localeNames.js
index f989f27b97c57..24ff47a663615 100644
--- a/scripts/localeNames.js
+++ b/scripts/localeNames.js
@@ -6,6 +6,7 @@ module.exports = {
   'hy-AM': 'Armenian',
   'az-AZ': 'Azerbaijani',
   'bn-BD': 'Bangla',
+  eu: 'Basque',
   'be-BY': 'Belarusian',
   'bg-BG': 'Bulgarian',
   'ca-ES': 'Catalan',
diff --git a/scripts/x-date-pickers-pro.exports.json b/scripts/x-date-pickers-pro.exports.json
index 42f2f6b4027ba..5002ac2590cdb 100644
--- a/scripts/x-date-pickers-pro.exports.json
+++ b/scripts/x-date-pickers-pro.exports.json
@@ -128,6 +128,7 @@
   { "name": "elGR", "kind": "Variable" },
   { "name": "enUS", "kind": "Variable" },
   { "name": "esES", "kind": "Variable" },
+  { "name": "eu", "kind": "Variable" },
   { "name": "ExportedDateRangeCalendarProps", "kind": "Interface" },
   { "name": "ExportedDigitalClockProps", "kind": "Interface" },
   { "name": "ExportedMultiSectionDigitalClockSectionProps", "kind": "Interface" },
diff --git a/scripts/x-date-pickers.exports.json b/scripts/x-date-pickers.exports.json
index 08052f41bf95f..9b3b709474868 100644
--- a/scripts/x-date-pickers.exports.json
+++ b/scripts/x-date-pickers.exports.json
@@ -98,6 +98,7 @@
   { "name": "elGR", "kind": "Variable" },
   { "name": "enUS", "kind": "Variable" },
   { "name": "esES", "kind": "Variable" },
+  { "name": "eu", "kind": "Variable" },
   { "name": "ExportedDigitalClockProps", "kind": "Interface" },
   { "name": "ExportedMultiSectionDigitalClockSectionProps", "kind": "Interface" },
   { "name": "ExportedPickersCalendarHeaderProps", "kind": "TypeAlias" },