diff --git a/libs/data-access/gn4/src/openapi/api/tools.api.service.ts b/libs/data-access/gn4/src/openapi/api/tools.api.service.ts
index c03adcf654..ffb0c02e7a 100644
--- a/libs/data-access/gn4/src/openapi/api/tools.api.service.ts
+++ b/libs/data-access/gn4/src/openapi/api/tools.api.service.ts
@@ -14,18 +14,31 @@
 import { Inject, Injectable, Optional } from '@angular/core'
 import {
   HttpClient,
+  HttpEvent,
   HttpHeaders,
+  HttpParameterCodec,
   HttpParams,
   HttpResponse,
-  HttpEvent,
-  HttpParameterCodec,
 } from '@angular/common/http'
 import { CustomHttpParameterCodec } from '../encoder'
 import { Observable } from 'rxjs'
 
-import { BASE_PATH, COLLECTION_FORMATS } from '../variables'
+import { BASE_PATH } from '../variables'
 import { Configuration } from '../configuration'
 
+interface thesaurusResponse {
+  values: string[]
+  definitions: string[]
+  coordEast: string
+  coordWest: string
+  coordSouth: string
+  coordNorth: string
+  thesaurusKey: string
+  value: string
+  uri: string
+  definition: string
+}
+
 @Injectable({
   providedIn: 'root',
 })
@@ -913,4 +926,88 @@ export class ToolsApiService {
       }
     )
   }
+
+  /**
+   * List database translations (used to overrides client application translations).
+   * @param esFieldName set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+   * @param iso3 set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+   * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
+   * @param reportProgress flag to report request and response progress.
+   */
+  public getTranslationsFromThesaurus(
+    thesaurusName: string,
+    langIso3: string,
+    observe?: 'body',
+    reportProgress?: boolean,
+    options?: { httpHeaderAccept?: 'application/json' }
+  ): Observable<any>
+  public getTranslationsFromThesaurus(
+    thesaurusName: string,
+    langIso3: string,
+    observe?: 'response',
+    reportProgress?: boolean,
+    options?: { httpHeaderAccept?: 'application/json' }
+  ): Observable<thesaurusResponse[]>
+  public getTranslationsFromThesaurus(
+    thesaurusName: string,
+    langIso3: string,
+    observe?: 'events',
+    reportProgress?: boolean,
+    options?: { httpHeaderAccept?: 'application/json' }
+  ): Observable<thesaurusResponse[]>
+  public getTranslationsFromThesaurus(
+    thesaurusName: string,
+    langIso3: string,
+    observe: any = 'body',
+    reportProgress: boolean = false,
+    options?: { httpHeaderAccept?: 'application/json' }
+  ): Observable<any> {
+    if (
+      thesaurusName === null ||
+      thesaurusName === undefined ||
+      langIso3 === null ||
+      langIso3 === undefined
+    ) {
+      throw new Error(
+        'Required parameter pack was null or undefined when calling getTranslationsFromThesaurus.'
+      )
+    }
+
+    let headers = this.defaultHeaders
+
+    let httpHeaderAcceptSelected: string | undefined =
+      options && options.httpHeaderAccept
+    if (httpHeaderAcceptSelected === undefined) {
+      // to determine the Accept header
+      const httpHeaderAccepts: string[] = ['application/json']
+      httpHeaderAcceptSelected =
+        this.configuration.selectHeaderAccept(httpHeaderAccepts)
+    }
+    if (httpHeaderAcceptSelected !== undefined) {
+      headers = headers.set('Accept', httpHeaderAcceptSelected)
+    }
+
+    let responseType_: 'text' | 'json' = 'json'
+    if (
+      httpHeaderAcceptSelected &&
+      httpHeaderAcceptSelected.startsWith('text')
+    ) {
+      responseType_ = 'text'
+    }
+
+    return this.httpClient.get<thesaurusResponse[]>(
+      `${
+        this.configuration.basePath
+      }/registries/vocabularies/search?rows=1000&type=CONTAINS&sort=DESC&thesaurus=${encodeURIComponent(
+        String(thesaurusName)
+      )}&lang=${encodeURIComponent(langIso3)}`,
+      {
+        responseType: <any>responseType_,
+        withCredentials: this.configuration.withCredentials,
+        headers: headers,
+        observe: observe,
+        reportProgress: reportProgress,
+      }
+    )
+  }
 }
diff --git a/libs/feature/search/src/lib/utils/service/fields.service.ts b/libs/feature/search/src/lib/utils/service/fields.service.ts
index 8c2bed40ae..2dd767e61f 100644
--- a/libs/feature/search/src/lib/utils/service/fields.service.ts
+++ b/libs/feature/search/src/lib/utils/service/fields.service.ts
@@ -1,14 +1,15 @@
 import { Injectable, Injector } from '@angular/core'
 import {
   AbstractSearchField,
-  GnUiTranslationSearchField,
   FieldValue,
   FullTextSearchField,
+  GnUiTranslationSearchField,
   IsSpatialSearchField,
   LicenseSearchField,
   OrganizationSearchField,
   OwnerSearchField,
   SimpleSearchField,
+  ThesaurusTranslationSearchField,
 } from './fields'
 import { forkJoin, Observable, of } from 'rxjs'
 import { map } from 'rxjs/operators'
@@ -52,8 +53,9 @@ export class FieldsService {
       this.injector
     ),
     topic: new GnUiTranslationSearchField('cl_topic.key', 'asc', this.injector),
-    inspireKeyword: new SimpleSearchField(
-      'th_httpinspireeceuropaeutheme-theme_tree.default',
+    inspireKeyword: new ThesaurusTranslationSearchField(
+      'th_httpinspireeceuropaeutheme-theme.link',
+      'external.theme.httpinspireeceuropaeutheme-theme',
       'asc',
       this.injector
     ),
diff --git a/libs/feature/search/src/lib/utils/service/fields.ts b/libs/feature/search/src/lib/utils/service/fields.ts
index 272fb73362..a3129015c7 100644
--- a/libs/feature/search/src/lib/utils/service/fields.ts
+++ b/libs/feature/search/src/lib/utils/service/fields.ts
@@ -14,6 +14,7 @@ import {
 } from '@geonetwork-ui/common/domain/search'
 import { RecordsRepositoryInterface } from '@geonetwork-ui/common/domain/records-repository.interface'
 import { ElasticsearchService } from '@geonetwork-ui/api/repository/gn4'
+import { LangService } from '@geonetwork-ui/util/i18n'
 
 export type FieldValue = string | number
 export interface FieldAvailableValue {
@@ -127,6 +128,57 @@ export class GnUiTranslationSearchField extends SimpleSearchField {
   }
 }
 
+export class ThesaurusTranslationSearchField extends SimpleSearchField {
+  private toolsApiService = this.injector.get(ToolsApiService)
+  private langService = this.injector.get(LangService)
+  allTranslations = this.toolsApiService
+    .getTranslationsFromThesaurus(this.thesaurusName, this.langService.iso3)
+    .pipe(
+      map((thesaurus) => {
+        const alltranslations = {}
+        thesaurus.map((val) => {
+          alltranslations[val.uri] = val.value
+        })
+        return alltranslations
+      }),
+      catchError(() => {
+        console.warn('Error while loading thesaurus language package')
+        return of({})
+      }),
+      shareReplay(1)
+    )
+
+  constructor(
+    esFieldName: string,
+    protected thesaurusName: string,
+    order: 'asc' | 'desc' = 'asc',
+    injector: Injector
+  ) {
+    super(esFieldName, order, injector)
+  }
+
+  private async getTranslation(topicKey: string) {
+    return firstValueFrom(
+      this.allTranslations.pipe(map((translations) => translations[topicKey]))
+    )
+  }
+
+  protected async getBucketLabel(bucket: TermBucket) {
+    return (await this.getTranslation(bucket.term)) || bucket.term
+  }
+
+  getAvailableValues(): Observable<FieldAvailableValue[]> {
+    // sort values by alphabetical order
+    return super
+      .getAvailableValues()
+      .pipe(
+        map((values) =>
+          values.sort((a, b) => new Intl.Collator().compare(a.label, b.label))
+        )
+      )
+  }
+}
+
 export class FullTextSearchField implements AbstractSearchField {
   getAvailableValues(): Observable<FieldAvailableValue[]> {
     return of([])