diff --git a/src/app/app.module.ts b/src/app/app.module.ts
index 67cd297df6add9d93a47f3730bc367ad699fc1d7..f941de92a72df2c1ddf5e8ecabd191e22d2a91e5 100644
--- a/src/app/app.module.ts
+++ b/src/app/app.module.ts
@@ -63,6 +63,7 @@ import { TagCloudComponent } from './components/shared/tag-cloud/tag-cloud.compo
 import { MatDialogModule } from '@angular/material/dialog';
 import {TagCloudModule} from 'angular-tag-cloud-module';
 import {SpacyService} from './services/http/spacy.service';
+import { CleaningFunctionService} from './services/util/cleaning-function.service';
 
 import 'prismjs';
 import 'prismjs/plugins/line-numbers/prism-line-numbers.js';
@@ -176,6 +177,7 @@ export function initializeApp(appConfig: AppConfig) {
     CustomIconService,
     WsConnectorService,
     SpacyService,
+    CleaningFunctionService,
     {
       provide: MatDialogRef,
       useValue: {
diff --git a/src/app/components/shared/_dialogs/create-comment/create-comment.component.ts b/src/app/components/shared/_dialogs/create-comment/create-comment.component.ts
index d39c798de3c1a306f8b69596cff455f17c7b1a22..4c59942a4a8dc03160a61a9e33eeb42509382b76 100644
--- a/src/app/components/shared/_dialogs/create-comment/create-comment.component.ts
+++ b/src/app/components/shared/_dialogs/create-comment/create-comment.component.ts
@@ -116,12 +116,6 @@ export class CreateCommentComponent implements OnInit, OnDestroy {
     }
   }
 
-  checkUTFEmoji(body: string): string {
-    const regex = /(?:\:.*?\:|[\u2700-\u27bf]|(?:\ud83c[\udde6-\uddff]){2}|[\ud800-\udbff][\udc00-\udfff]|[\u0023-\u0039]\ufe0f?\u20e3|\u3299|\u3297|\u303d|\u3030|\u24c2|\ud83c[\udd70-\udd71]|\ud83c[\udd7e-\udd7f]|\ud83c\udd8e|\ud83c[\udd91-\udd9a]|\ud83c[\udde6-\uddff]|\ud83c[\ude01-\ude02]|\ud83c\ude1a|\ud83c\ude2f|\ud83c[\ude32-\ude3a]|\ud83c[\ude50-\ude51]|\u203c|\u2049|[\u25aa-\u25ab]|\u25b6|\u25c0|[\u25fb-\u25fe]|\u00a9|\u00ae|\u2122|\u2139|\ud83c\udc04|[\u2600-\u26FF]|\u2b05|\u2b06|\u2b07|\u2b1b|\u2b1c|\u2b50|\u2b55|\u231a|\u231b|\u2328|\u23cf|[\u23e9-\u23f3]|[\u23f8-\u23fa]|\ud83c\udccf|\u2934|\u2935|[\u2190-\u21ff])/g;
-
-    return body.replace(regex, '');
-  }
-
   openSpacyDialog(comment: Comment): void {
     CreateCommentKeywords.isSpellingAcceptable(this.languagetoolService, this.inputText, this.selectedLang)
       .subscribe((result) => {
diff --git a/src/app/components/shared/_dialogs/spacy-dialog/spacy-dialog.component.ts b/src/app/components/shared/_dialogs/spacy-dialog/spacy-dialog.component.ts
index 23ef9c3ebb2260255822b95ff9cb8277fe1f5f4d..e9135039b507867e40635f5b5937d4c3a9299c30 100644
--- a/src/app/components/shared/_dialogs/spacy-dialog/spacy-dialog.component.ts
+++ b/src/app/components/shared/_dialogs/spacy-dialog/spacy-dialog.component.ts
@@ -1,6 +1,7 @@
 import { AfterContentInit, Component, Inject, OnInit } from '@angular/core';
 import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
 
+import { CleaningFunctionService} from '../../../../services/util/cleaning-function.service';
 import { CreateCommentComponent } from '../create-comment/create-comment.component';
 import { SpacyService, Model } from '../../../../services/http/spacy.service';
 import { LanguageService } from '../../../../services/util/language.service';
@@ -33,6 +34,7 @@ export class SpacyDialogComponent implements OnInit, AfterContentInit {
   constructor(
     protected langService: LanguageService,
     private spacyService: SpacyService,
+    private cleaningService: CleaningFunctionService,
     public dialogRef: MatDialogRef<CreateCommentComponent>,
     @Inject(MAT_DIALOG_DATA) public data) {
   }
@@ -69,7 +71,7 @@ export class SpacyDialogComponent implements OnInit, AfterContentInit {
     this.isLoading = true;
 
     // N at first pos = all Nouns(NN de/en) including singular(NN, NNP en), plural (NNPS, NNS en), proper Noun(NNE, NE de)
-    this.spacyService.getKeywords(this.commentBodyChecked, model)
+    this.spacyService.getKeywords(this.cleaningService.cleaningFunction(this.commentBodyChecked), model)
       .pipe(
         map(keywords => keywords.map(keyword => ({
           word: keyword,
diff --git a/src/app/services/util/cleaning-function.service.spec.ts b/src/app/services/util/cleaning-function.service.spec.ts
new file mode 100644
index 0000000000000000000000000000000000000000..b1900ddb4f118761b4046d5323f51047e7c8d3ce
--- /dev/null
+++ b/src/app/services/util/cleaning-function.service.spec.ts
@@ -0,0 +1,18 @@
+/*
+import { TestBed } from '@angular/core/testing';
+
+import { CleaningFunctionService } from './cleaning-function.service';
+
+describe('CleaningFunctionService', () => {
+  let service: CleaningFunctionService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(CleaningFunctionService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});
+ */
diff --git a/src/app/services/util/cleaning-function.service.ts b/src/app/services/util/cleaning-function.service.ts
new file mode 100644
index 0000000000000000000000000000000000000000..d32caf3f69037b59742bdbb2820dccc08e1ad2ac
--- /dev/null
+++ b/src/app/services/util/cleaning-function.service.ts
@@ -0,0 +1,19 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CleaningFunctionService {
+  regexKatex    = new RegExp('\\$[^$\\n ]+\\$|\\$\\$[^$\\n ]+\\$\\$','g');
+  regexEmoji    = new RegExp('\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff]', 'g');
+  regexMarkdown = new RegExp('(?:__|[*#])|\\[(.+?)]\\((.+?)\\)', 'g');
+
+  constructor(
+  ) {}
+  cleaningFunction(text: string): string {
+    text = text.replace(this.regexKatex,'');
+    text = text.replace(this.regexEmoji,'');
+    text = text.replace(this.regexMarkdown,'');
+    return text;
+  }
+}