diff --git a/backend/src/middleware/permissionsMiddleware.js b/backend/src/middleware/permissionsMiddleware.js
index f6f675008..e588e1b62 100644
--- a/backend/src/middleware/permissionsMiddleware.js
+++ b/backend/src/middleware/permissionsMiddleware.js
@@ -323,6 +323,7 @@ export default shield(
       GenerateInviteCode: isAuthenticated,
       switchUserRole: isAdmin,
       markTeaserAsViewed: allow,
+      saveCategorySettings: isAuthenticated,
     },
     User: {
       email: or(isMyOwn, isAdmin),
diff --git a/backend/src/schema/resolvers/groups.js b/backend/src/schema/resolvers/groups.js
index 9aac2ab6a..239a299dd 100644
--- a/backend/src/schema/resolvers/groups.js
+++ b/backend/src/schema/resolvers/groups.js
@@ -18,19 +18,25 @@ export default {
         if (isMember === true) {
           groupCypher = `
             MATCH (:User {id: $userId})-[membership:MEMBER_OF]->(group:Group${groupIdCypher})
+            WITH group, membership
+            WHERE (group.groupType IN ['public', 'closed']) OR (group.groupType = 'hidden' AND membership.role IN ['usual', 'admin', 'owner'])
             RETURN group {.*, myRole: membership.role}
           `
         } else {
           if (isMember === false) {
             groupCypher = `
               MATCH (group:Group${groupIdCypher})
-              WHERE NOT (:User {id: $userId})-[:MEMBER_OF]->(group)
+              WHERE (NOT (:User {id: $userId})-[:MEMBER_OF]->(group))
+              WITH group
+              WHERE group.groupType IN ['public', 'closed']
               RETURN group {.*, myRole: NULL}
             `
           } else {
             groupCypher = `
               MATCH (group:Group${groupIdCypher})
               OPTIONAL MATCH (:User {id: $userId})-[membership:MEMBER_OF]->(group)
+              WITH group, membership
+              WHERE (group.groupType IN ['public', 'closed']) OR (group.groupType = 'hidden' AND membership.role IN ['usual', 'admin', 'owner'])
               RETURN group {.*, myRole: membership.role}
             `
           }
diff --git a/backend/src/schema/resolvers/groups.spec.js b/backend/src/schema/resolvers/groups.spec.js
index 2ca40b3e7..e9b38cc2b 100644
--- a/backend/src/schema/resolvers/groups.spec.js
+++ b/backend/src/schema/resolvers/groups.spec.js
@@ -267,6 +267,7 @@ describe('in mode', () => {
 
       describe('authenticated', () => {
         let otherUser
+        let ownerOfHiddenGroupUser
 
         beforeAll(async () => {
           otherUser = await Factory.build(
@@ -276,7 +277,18 @@ describe('in mode', () => {
               name: 'Other TestUser',
             },
             {
-              email: 'test2@example.org',
+              email: 'other-user@example.org',
+              password: '1234',
+            },
+          )
+          ownerOfHiddenGroupUser = await Factory.build(
+            'user',
+            {
+              id: 'owner-of-hidden-group',
+              name: 'Owner Of Hidden Group',
+            },
+            {
+              email: 'owner-of-hidden-group@example.org',
               password: '1234',
             },
           )
@@ -293,6 +305,59 @@ describe('in mode', () => {
               categoryIds,
             },
           })
+          authenticatedUser = await ownerOfHiddenGroupUser.toJson()
+          await mutate({
+            mutation: createGroupMutation,
+            variables: {
+              id: 'hidden-group',
+              name: 'Investigative Journalism Group',
+              about: 'We will change all.',
+              description: 'We research …' + descriptionAdditional100,
+              groupType: 'hidden',
+              actionRadius: 'global',
+              categoryIds,
+            },
+          })
+          await mutate({
+            mutation: createGroupMutation,
+            variables: {
+              id: 'second-hidden-group',
+              name: 'Second Investigative Journalism Group',
+              about: 'We will change all.',
+              description: 'We research …' + descriptionAdditional100,
+              groupType: 'hidden',
+              actionRadius: 'global',
+              categoryIds,
+            },
+          })
+          await mutate({
+            mutation: changeGroupMemberRoleMutation,
+            variables: {
+              groupId: 'second-hidden-group',
+              userId: 'current-user',
+              roleInGroup: 'pending',
+            },
+          })
+          await mutate({
+            mutation: createGroupMutation,
+            variables: {
+              id: 'third-hidden-group',
+              name: 'Third Investigative Journalism Group',
+              about: 'We will change all.',
+              description: 'We research …' + descriptionAdditional100,
+              groupType: 'hidden',
+              actionRadius: 'global',
+              categoryIds,
+            },
+          })
+          await mutate({
+            mutation: changeGroupMemberRoleMutation,
+            variables: {
+              groupId: 'third-hidden-group',
+              userId: 'current-user',
+              roleInGroup: 'usual',
+            },
+          })
           authenticatedUser = await user.toJson()
           await mutate({
             mutation: createGroupMutation,
@@ -309,117 +374,175 @@ describe('in mode', () => {
         })
 
         describe('query groups', () => {
-          describe('without any filters', () => {
-            it('finds all groups', async () => {
-              await expect(query({ query: groupQuery, variables: {} })).resolves.toMatchObject({
-                data: {
-                  Group: expect.arrayContaining([
-                    expect.objectContaining({
-                      id: 'my-group',
-                      slug: 'the-best-group',
-                      myRole: 'owner',
-                    }),
-                    expect.objectContaining({
-                      id: 'others-group',
-                      slug: 'uninteresting-group',
-                      myRole: null,
-                    }),
-                  ]),
-                },
-                errors: undefined,
-              })
-            })
-
-            describe('categories', () => {
-              beforeEach(() => {
-                CONFIG.CATEGORIES_ACTIVE = true
-              })
-
-              it('has set categories', async () => {
-                await expect(query({ query: groupQuery, variables: {} })).resolves.toMatchObject({
+          describe('in general finds only listed groups – no hidden groups where user is none or pending member', () => {
+            describe('without any filters', () => {
+              it('finds all listed groups', async () => {
+                const result = await query({ query: groupQuery, variables: {} })
+                expect(result).toMatchObject({
                   data: {
                     Group: expect.arrayContaining([
                       expect.objectContaining({
                         id: 'my-group',
                         slug: 'the-best-group',
-                        categories: expect.arrayContaining([
-                          expect.objectContaining({ id: 'cat4' }),
-                          expect.objectContaining({ id: 'cat9' }),
-                          expect.objectContaining({ id: 'cat15' }),
-                        ]),
                         myRole: 'owner',
                       }),
                       expect.objectContaining({
                         id: 'others-group',
                         slug: 'uninteresting-group',
-                        categories: expect.arrayContaining([
-                          expect.objectContaining({ id: 'cat4' }),
-                          expect.objectContaining({ id: 'cat9' }),
-                          expect.objectContaining({ id: 'cat15' }),
-                        ]),
+                        myRole: null,
+                      }),
+                      expect.objectContaining({
+                        id: 'third-hidden-group',
+                        slug: 'third-investigative-journalism-group',
+                        myRole: 'usual',
+                      }),
+                    ]),
+                  },
+                  errors: undefined,
+                })
+                expect(result.data.Group.length).toBe(3)
+              })
+
+              describe('categories', () => {
+                beforeEach(() => {
+                  CONFIG.CATEGORIES_ACTIVE = true
+                })
+
+                it('has set categories', async () => {
+                  await expect(query({ query: groupQuery, variables: {} })).resolves.toMatchObject({
+                    data: {
+                      Group: expect.arrayContaining([
+                        expect.objectContaining({
+                          id: 'my-group',
+                          slug: 'the-best-group',
+                          categories: expect.arrayContaining([
+                            expect.objectContaining({ id: 'cat4' }),
+                            expect.objectContaining({ id: 'cat9' }),
+                            expect.objectContaining({ id: 'cat15' }),
+                          ]),
+                          myRole: 'owner',
+                        }),
+                        expect.objectContaining({
+                          id: 'others-group',
+                          slug: 'uninteresting-group',
+                          categories: expect.arrayContaining([
+                            expect.objectContaining({ id: 'cat4' }),
+                            expect.objectContaining({ id: 'cat9' }),
+                            expect.objectContaining({ id: 'cat15' }),
+                          ]),
+                          myRole: null,
+                        }),
+                      ]),
+                    },
+                    errors: undefined,
+                  })
+                })
+              })
+            })
+
+            describe('with given id', () => {
+              describe("id = 'my-group'", () => {
+                it('finds only the listed group with this id', async () => {
+                  const result = await query({ query: groupQuery, variables: { id: 'my-group' } })
+                  expect(result).toMatchObject({
+                    data: {
+                      Group: [
+                        expect.objectContaining({
+                          id: 'my-group',
+                          slug: 'the-best-group',
+                          myRole: 'owner',
+                        }),
+                      ],
+                    },
+                    errors: undefined,
+                  })
+                  expect(result.data.Group.length).toBe(1)
+                })
+              })
+
+              describe("id = 'third-hidden-group'", () => {
+                it("finds only the hidden group where I'm 'usual' member", async () => {
+                  const result = await query({
+                    query: groupQuery,
+                    variables: { id: 'third-hidden-group' },
+                  })
+                  expect(result).toMatchObject({
+                    data: {
+                      Group: expect.arrayContaining([
+                        expect.objectContaining({
+                          id: 'third-hidden-group',
+                          slug: 'third-investigative-journalism-group',
+                          myRole: 'usual',
+                        }),
+                      ]),
+                    },
+                    errors: undefined,
+                  })
+                  expect(result.data.Group.length).toBe(1)
+                })
+              })
+
+              describe("id = 'second-hidden-group'", () => {
+                it("finds no hidden group where I'm 'pending' member", async () => {
+                  const result = await query({
+                    query: groupQuery,
+                    variables: { id: 'second-hidden-group' },
+                  })
+                  expect(result.data.Group.length).toBe(0)
+                })
+              })
+
+              describe("id = 'hidden-group'", () => {
+                it("finds no hidden group where I'm not(!) a member at all", async () => {
+                  const result = await query({
+                    query: groupQuery,
+                    variables: { id: 'hidden-group' },
+                  })
+                  expect(result.data.Group.length).toBe(0)
+                })
+              })
+            })
+
+            describe('isMember = true', () => {
+              it('finds only listed groups where user is member', async () => {
+                const result = await query({ query: groupQuery, variables: { isMember: true } })
+                expect(result).toMatchObject({
+                  data: {
+                    Group: expect.arrayContaining([
+                      expect.objectContaining({
+                        id: 'my-group',
+                        slug: 'the-best-group',
+                        myRole: 'owner',
+                      }),
+                      expect.objectContaining({
+                        id: 'third-hidden-group',
+                        slug: 'third-investigative-journalism-group',
+                        myRole: 'usual',
+                      }),
+                    ]),
+                  },
+                  errors: undefined,
+                })
+                expect(result.data.Group.length).toBe(2)
+              })
+            })
+
+            describe('isMember = false', () => {
+              it('finds only listed groups where user is not(!) member', async () => {
+                const result = await query({ query: groupQuery, variables: { isMember: false } })
+                expect(result).toMatchObject({
+                  data: {
+                    Group: expect.arrayContaining([
+                      expect.objectContaining({
+                        id: 'others-group',
+                        slug: 'uninteresting-group',
                         myRole: null,
                       }),
                     ]),
                   },
                   errors: undefined,
                 })
-              })
-            })
-          })
-
-          describe("id = 'my-group'", () => {
-            it('finds only the group with this id', async () => {
-              await expect(
-                query({ query: groupQuery, variables: { id: 'my-group' } }),
-              ).resolves.toMatchObject({
-                data: {
-                  Group: [
-                    expect.objectContaining({
-                      id: 'my-group',
-                      slug: 'the-best-group',
-                      myRole: 'owner',
-                    }),
-                  ],
-                },
-                errors: undefined,
-              })
-            })
-          })
-
-          describe('isMember = true', () => {
-            it('finds only groups where user is member', async () => {
-              await expect(
-                query({ query: groupQuery, variables: { isMember: true } }),
-              ).resolves.toMatchObject({
-                data: {
-                  Group: [
-                    {
-                      id: 'my-group',
-                      slug: 'the-best-group',
-                      myRole: 'owner',
-                    },
-                  ],
-                },
-                errors: undefined,
-              })
-            })
-          })
-
-          describe('isMember = false', () => {
-            it('finds only groups where user is not(!) member', async () => {
-              await expect(
-                query({ query: groupQuery, variables: { isMember: false } }),
-              ).resolves.toMatchObject({
-                data: {
-                  Group: expect.arrayContaining([
-                    expect.objectContaining({
-                      id: 'others-group',
-                      slug: 'uninteresting-group',
-                      myRole: null,
-                    }),
-                  ]),
-                },
-                errors: undefined,
+                expect(result.data.Group.length).toBe(1)
               })
             })
           })
diff --git a/backend/src/schema/resolvers/users.js b/backend/src/schema/resolvers/users.js
index 5dc78c5e1..23a39a2a1 100644
--- a/backend/src/schema/resolvers/users.js
+++ b/backend/src/schema/resolvers/users.js
@@ -269,6 +269,45 @@ export default {
         session.close()
       }
     },
+    saveCategorySettings: async (object, args, context, resolveInfo) => {
+      const { activeCategories } = args
+      const {
+        user: { id },
+      } = context
+
+      const session = context.driver.session()
+      await session.writeTransaction((transaction) => {
+        return transaction.run(
+          `
+          MATCH (user:User { id: $id })-[previousCategories:NOT_INTERESTED_IN]->(category:Category)
+          DELETE previousCategories
+          RETURN user, category
+        `,
+          { id },
+        )
+      })
+      const writeTxResultPromise = session.writeTransaction(async (transaction) => {
+        const saveCategorySettingsResponse = await transaction.run(
+          `
+            MATCH (category:Category) WHERE NOT category.id IN $activeCategories
+            MATCH (user:User { id: $id })
+            MERGE (user)-[r:NOT_INTERESTED_IN]->(category)
+            RETURN user, r, category
+          `,
+          { id, activeCategories },
+        )
+        const [user] = await saveCategorySettingsResponse.records.map((record) =>
+          record.get('user'),
+        )
+        return user
+      })
+      try {
+        await writeTxResultPromise
+        return true
+      } finally {
+        session.close()
+      }
+    },
   },
   User: {
     email: async (parent, params, context, resolveInfo) => {
diff --git a/backend/src/schema/resolvers/users.spec.js b/backend/src/schema/resolvers/users.spec.js
index 920ef52ea..7116d2201 100644
--- a/backend/src/schema/resolvers/users.spec.js
+++ b/backend/src/schema/resolvers/users.spec.js
@@ -3,6 +3,7 @@ import { gql } from '../../helpers/jest'
 import { getNeode, getDriver } from '../../db/neo4j'
 import createServer from '../../server'
 import { createTestClient } from 'apollo-server-testing'
+import { categories } from '../../constants/categories'
 
 const categoryIds = ['cat9']
 let user
@@ -56,6 +57,12 @@ const switchUserRoleMutation = gql`
   }
 `
 
+const saveCategorySettings = gql`
+  mutation ($activeCategories: [String]) {
+    saveCategorySettings(activeCategories: $activeCategories)
+  }
+`
+
 beforeAll(async () => {
   await cleanDatabase()
 
@@ -544,3 +551,146 @@ describe('switch user role', () => {
     })
   })
 })
+
+describe('save category settings', () => {
+  beforeEach(async () => {
+    await Promise.all(
+      categories.map(({ icon, name }, index) => {
+        Factory.build('category', {
+          id: `cat${index + 1}`,
+          slug: name,
+          name,
+          icon,
+        })
+      }),
+    )
+  })
+
+  beforeEach(async () => {
+    user = await Factory.build('user', {
+      id: 'user',
+      role: 'user',
+    })
+    variables = {
+      activeCategories: ['cat1', 'cat3', 'cat5'],
+    }
+  })
+
+  describe('not authenticated', () => {
+    beforeEach(async () => {
+      authenticatedUser = undefined
+    })
+
+    it('throws an error', async () => {
+      await expect(mutate({ mutation: saveCategorySettings, variables })).resolves.toEqual(
+        expect.objectContaining({
+          errors: [
+            expect.objectContaining({
+              message: 'Not Authorized!',
+            }),
+          ],
+        }),
+      )
+    })
+  })
+
+  describe('authenticated', () => {
+    beforeEach(async () => {
+      authenticatedUser = await user.toJson()
+    })
+
+    const userQuery = gql`
+      query ($id: ID) {
+        User(id: $id) {
+          activeCategories {
+            id
+          }
+        }
+      }
+    `
+
+    describe('no categories saved', () => {
+      it('returns true for active categories mutation', async () => {
+        await expect(mutate({ mutation: saveCategorySettings, variables })).resolves.toEqual(
+          expect.objectContaining({
+            data: { saveCategorySettings: true },
+          }),
+        )
+      })
+
+      describe('query for user', () => {
+        beforeEach(async () => {
+          await mutate({ mutation: saveCategorySettings, variables })
+        })
+
+        it('returns the active categories when user is queried', async () => {
+          await expect(
+            query({ query: userQuery, variables: { id: authenticatedUser.id } }),
+          ).resolves.toEqual(
+            expect.objectContaining({
+              data: {
+                User: [
+                  {
+                    activeCategories: expect.arrayContaining([
+                      { id: 'cat1' },
+                      { id: 'cat3' },
+                      { id: 'cat5' },
+                    ]),
+                  },
+                ],
+              },
+            }),
+          )
+        })
+      })
+    })
+
+    describe('categories already saved', () => {
+      beforeEach(async () => {
+        variables = {
+          activeCategories: ['cat1', 'cat3', 'cat5'],
+        }
+        await mutate({ mutation: saveCategorySettings, variables })
+        variables = {
+          activeCategories: ['cat10', 'cat11', 'cat12', 'cat8', 'cat9'],
+        }
+      })
+
+      it('returns true', async () => {
+        await expect(mutate({ mutation: saveCategorySettings, variables })).resolves.toEqual(
+          expect.objectContaining({
+            data: { saveCategorySettings: true },
+          }),
+        )
+      })
+
+      describe('query for user', () => {
+        beforeEach(async () => {
+          await mutate({ mutation: saveCategorySettings, variables })
+        })
+
+        it('returns the new active categories when user is queried', async () => {
+          await expect(
+            query({ query: userQuery, variables: { id: authenticatedUser.id } }),
+          ).resolves.toEqual(
+            expect.objectContaining({
+              data: {
+                User: [
+                  {
+                    activeCategories: expect.arrayContaining([
+                      { id: 'cat10' },
+                      { id: 'cat11' },
+                      { id: 'cat12' },
+                      { id: 'cat8' },
+                      { id: 'cat9' },
+                    ]),
+                  },
+                ],
+              },
+            }),
+          )
+        })
+      })
+    })
+  })
+})
diff --git a/backend/src/schema/types/type/User.gql b/backend/src/schema/types/type/User.gql
index 4219cd00e..3d71aac78 100644
--- a/backend/src/schema/types/type/User.gql
+++ b/backend/src/schema/types/type/User.gql
@@ -115,6 +115,14 @@ type User {
 
   emotions: [EMOTED]
 
+  activeCategories: [Category] @cypher(
+  statement: """
+  MATCH (category:Category)
+  WHERE NOT ((this)-[:NOT_INTERESTED_IN]->(category))
+  RETURN category
+  """
+  )
+
   myRoleInGroup: GroupMemberRole
 }
 
@@ -222,4 +230,6 @@ type Mutation {
   unblockUser(id: ID!): User
 
   switchUserRole(role: UserRole!, id: ID!): User
+
+  saveCategorySettings(activeCategories: [String]): Boolean
 }
diff --git a/webapp/components/FilterMenu/CategoriesMenu.vue b/webapp/components/FilterMenu/CategoriesMenu.vue
new file mode 100644
index 000000000..37bd19c84
--- /dev/null
+++ b/webapp/components/FilterMenu/CategoriesMenu.vue
@@ -0,0 +1,58 @@
+<template>
+  <dropdown ref="category-menu" placement="top-start" :offset="8" class="category-menu">
+    <base-button
+      slot="default"
+      :filled="filterActive"
+      :ghost="!filterActive"
+      slot-scope="{ toggleMenu }"
+      @click.prevent="toggleMenu()"
+    >
+      <ds-text uppercase>{{ $t('admin.categories.name') }}</ds-text>
+    </base-button>
+    <template slot="popover">
+      <div class="category-menu-options">
+        <h2 class="title">{{ $t('filter-menu.filter-by') }}</h2>
+        <categories-filter v-if="categoriesActive" />
+      </div>
+    </template>
+  </dropdown>
+</template>
+
+<script>
+import Dropdown from '~/components/Dropdown'
+import { mapGetters } from 'vuex'
+import CategoriesFilter from './CategoriesFilter'
+
+export default {
+  name: 'CategoriesMenu',
+  components: {
+    Dropdown,
+    CategoriesFilter,
+  },
+  props: {
+    placement: { type: String },
+    offset: { type: [String, Number] },
+  },
+  data() {
+    return {
+      categoriesActive: this.$env.CATEGORIES_ACTIVE,
+    }
+  },
+  computed: {
+    ...mapGetters({
+      filterActive: 'posts/isActive',
+    }),
+  },
+}
+</script>
+
+<style lang="scss">
+.category-menu-options {
+  max-width: $size-max-width-filter-menu;
+  padding: $space-small $space-x-small;
+
+  > .title {
+    font-size: $font-size-large;
+  }
+}
+</style>
diff --git a/webapp/components/FilterMenu/FilterMenu.vue b/webapp/components/FilterMenu/FilterMenu.vue
index 84c7c1f67..9e211ccf9 100644
--- a/webapp/components/FilterMenu/FilterMenu.vue
+++ b/webapp/components/FilterMenu/FilterMenu.vue
@@ -14,7 +14,6 @@
       <div class="filter-menu-options">
         <h2 class="title">{{ $t('filter-menu.filter-by') }}</h2>
         <following-filter />
-        <categories-filter v-if="categoriesActive" />
       </div>
       <div class="filter-menu-options">
         <h2 class="title">{{ $t('filter-menu.order-by') }}</h2>
@@ -29,24 +28,17 @@ import Dropdown from '~/components/Dropdown'
 import { mapGetters } from 'vuex'
 import FollowingFilter from './FollowingFilter'
 import OrderByFilter from './OrderByFilter'
-import CategoriesFilter from './CategoriesFilter'
 
 export default {
   components: {
     Dropdown,
     FollowingFilter,
-    CategoriesFilter,
     OrderByFilter,
   },
   props: {
     placement: { type: String },
     offset: { type: [String, Number] },
   },
-  data() {
-    return {
-      categoriesActive: this.$env.CATEGORIES_ACTIVE,
-    }
-  },
   computed: {
     ...mapGetters({
       filterActive: 'posts/isActive',
diff --git a/webapp/layouts/default.vue b/webapp/layouts/default.vue
index 0dfd752bf..1e4fe5cf5 100644
--- a/webapp/layouts/default.vue
+++ b/webapp/layouts/default.vue
@@ -15,6 +15,15 @@
             >
               <base-button icon="bars" @click="toggleMobileMenuView" circle />
             </ds-flex-item>
+            <ds-flex-item
+              v-if="categoriesActive && isLoggedIn"
+              :class="{ 'hide-mobile-menu': !toggleMobileMenu }"
+              style="flex-grow: 0; flex-basis: auto"
+            >
+              <client-only>
+                <categories-menu></categories-menu>
+              </client-only>
+            </ds-flex-item>
             <ds-flex-item
               :width="{ base: '45%', sm: '45%', md: '45%', lg: '50%' }"
               :class="{ 'hide-mobile-menu': !toggleMobileMenu }"
@@ -90,6 +99,7 @@ import FilterMenu from '~/components/FilterMenu/FilterMenu.vue'
 import PageFooter from '~/components/PageFooter/PageFooter'
 import AvatarMenu from '~/components/AvatarMenu/AvatarMenu'
 import InviteButton from '~/components/InviteButton/InviteButton'
+import CategoriesMenu from '~/components/FilterMenu/CategoriesMenu.vue'
 
 export default {
   components: {
@@ -102,6 +112,7 @@ export default {
     FilterMenu,
     PageFooter,
     InviteButton,
+    CategoriesMenu,
   },
   mixins: [seo],
   data() {
@@ -109,6 +120,7 @@ export default {
       mobileSearchVisible: false,
       toggleMobileMenu: false,
       inviteRegistration: this.$env.INVITE_REGISTRATION === true, // for 'false' in .env INVITE_REGISTRATION is of type undefined and not(!) boolean false, because of internal handling,
+      categoriesActive: this.$env.CATEGORIES_ACTIVE,
     }
   },
   computed: {
diff --git a/webapp/locales/de.json b/webapp/locales/de.json
index 50f178fa2..a1e25444f 100644
--- a/webapp/locales/de.json
+++ b/webapp/locales/de.json
@@ -11,7 +11,7 @@
   "admin": {
     "categories": {
       "categoryName": "Name",
-      "name": "Kategorien",
+      "name": "Themen",
       "postCount": "Beiträge"
     },
     "dashboard": {
@@ -98,7 +98,7 @@
     }
   },
   "common": {
-    "category": "Kategorie ::: Kategorien",
+    "category": "Thema ::: Themen",
     "comment": "Kommentar ::: Kommentare",
     "letsTalk": "Miteinander reden",
     "loading": "wird geladen",
@@ -113,7 +113,7 @@
     "takeAction": "Aktiv werden",
     "user": "Benutzer ::: Benutzer",
     "validations": {
-      "categories": "es müssen eine bis drei Kategorien ausgewählt werden",
+      "categories": "es müssen eine bis drei Themen ausgewählt werden",
       "email": "muss eine gültige E-Mail-Adresse sein",
       "url": "muss eine gültige URL sein"
     },
@@ -214,7 +214,7 @@
     "amount-shouts": "{amount} recommendations",
     "amount-views": "{amount} views",
     "categories": {
-      "infoSelectedNoOfMaxCategories": "{chosen} von {max} Kategorien ausgewählt"
+      "infoSelectedNoOfMaxCategories": "{chosen} von {max} Themen ausgewählt"
     },
     "category": {
       "name": {
@@ -349,7 +349,7 @@
   },
   "filter-menu": {
     "all": "Alle",
-    "categories": "Themenkategorien",
+    "categories": "Themen",
     "emotions": "Emotionen",
     "filter-by": "Filtern nach ...",
     "following": "Benutzern, denen ich folge",
@@ -478,7 +478,7 @@
       "noDecision": "Keine Entscheidung!",
       "numberOfUsers": "{count} Nutzern",
       "previousDecision": "Vorherige Entscheidung:",
-      "reasonCategory": "Kategorie",
+      "reasonCategory": "Thema",
       "reasonDescription": "Beschreibung",
       "reportedOn": "Datum",
       "status": "Aktueller Status",
@@ -600,8 +600,8 @@
     },
     "reason": {
       "category": {
-        "invalid": "Bitte wähle eine gültige Kategorie aus",
-        "label": "Wähle eine Kategorie:",
+        "invalid": "Bitte wähle ein gültiges Thema aus",
+        "label": "Wähle ein Thema:",
         "options": {
           "advert_products_services_commercial": "Bewerben von Produkten und Dienstleistungen mit kommerzieller Absicht.",
           "criminal_behavior_violation_german_law": "Strafbares Verhalten bzw. Verstoß gegen deutsches Recht.",
@@ -612,7 +612,7 @@
           "other": "Andere …",
           "pornographic_content_links": "Das Senden oder Verlinken eindeutig pornografischen Materials."
         },
-        "placeholder": "Kategorie …"
+        "placeholder": "Thema …"
       },
       "description": {
         "label": "Bitte erkläre: Warum möchtest Du dies melden?",
diff --git a/webapp/locales/en.json b/webapp/locales/en.json
index 238264af9..eb590d5c6 100644
--- a/webapp/locales/en.json
+++ b/webapp/locales/en.json
@@ -11,7 +11,7 @@
   "admin": {
     "categories": {
       "categoryName": "Name",
-      "name": "Categories",
+      "name": "Topics",
       "postCount": "Posts"
     },
     "dashboard": {
@@ -98,7 +98,7 @@
     }
   },
   "common": {
-    "category": "Category ::: Categories",
+    "category": "Topic ::: Topics",
     "comment": "Comment ::: Comments",
     "letsTalk": "Let`s Talk",
     "loading": "loading",
@@ -113,7 +113,7 @@
     "takeAction": "Take Action",
     "user": "User ::: Users",
     "validations": {
-      "categories": "at least one and at most three categories must be selected",
+      "categories": "at least one and at most three topics must be selected",
       "email": "must be a valid e-mail address",
       "url": "must be a valid URL"
     },
@@ -214,7 +214,7 @@
     "amount-shouts": "{amount} recommendations",
     "amount-views": "{amount} views",
     "categories": {
-      "infoSelectedNoOfMaxCategories": "{chosen} of {max} categories selected"
+      "infoSelectedNoOfMaxCategories": "{chosen} of {max} topics selected"
     },
     "category": {
       "name": {
@@ -349,7 +349,7 @@
   },
   "filter-menu": {
     "all": "All",
-    "categories": "Categories of Content",
+    "categories": "Topics",
     "emotions": "Emotions",
     "filter-by": "Filter by ...",
     "following": "Users I follow",
@@ -478,7 +478,7 @@
       "noDecision": "No decision!",
       "numberOfUsers": "{count} users",
       "previousDecision": "Previous decision:",
-      "reasonCategory": "Category",
+      "reasonCategory": "Topic",
       "reasonDescription": "Description",
       "reportedOn": "Date",
       "status": "Current status",
@@ -600,8 +600,8 @@
     },
     "reason": {
       "category": {
-        "invalid": "Please select a valid category",
-        "label": "Select a category:",
+        "invalid": "Please select a valid topic",
+        "label": "Select a topic:",
         "options": {
           "advert_products_services_commercial": "Advertising products and services with commercial intent.",
           "criminal_behavior_violation_german_law": "Criminal behavior or violation of German law.",
@@ -612,7 +612,7 @@
           "other": "Other …",
           "pornographic_content_links": "Posting or linking of clearly pornographic material."
         },
-        "placeholder": "Category …"
+        "placeholder": "Topic …"
       },
       "description": {
         "label": "Please explain: Why you like to report this?",