diff --git a/frontend/i18n/zh/zh/generic.js b/frontend/i18n/zh/zh/generic.js
deleted file mode 100644
index e8fbd5ad..00000000
--- a/frontend/i18n/zh/zh/generic.js
+++ /dev/null
@@ -1,20 +0,0 @@
-export default {
-  continue: '继续',
-  yes: '是',
-  all: '全部',
-  save: '保存',
-  edit: '编辑',
-  create: '创建',
-  cancel: '取消',
-  close: '关闭',
-  upload: '上传',
-  add: '增加',
-  delete: '删除',
-  search: '搜索',
-  name: '名称',
-  import: '导入',
-  export: '导出',
-  description: '描述',
-  type: '类型',
-  loading: '加载中... 请等待'
-}
diff --git a/frontend/i18n/zh/zh/header.js b/frontend/i18n/zh/zh/header.js
deleted file mode 100644
index 9f50d6ab..00000000
--- a/frontend/i18n/zh/zh/header.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export default {
-  projects: '项目'
-}
diff --git a/frontend/i18n/zh/zh/home.js b/frontend/i18n/zh/zh/home.js
deleted file mode 100644
index a08eb781..00000000
--- a/frontend/i18n/zh/zh/home.js
+++ /dev/null
@@ -1,18 +0,0 @@
-export default {
-  mainTitle: '让文本标注服务人类',
-  getStarted: '快速开始',
-  startAnnotation: '开始标注',
-  featuresTitle: '功能特性',
-  featuresTitle1: '团队合作',
-  featuresText1: '与你的团队标注',
-  featuresTitle2: '任何语言',
-  featuresText2: '用任何语言标注',
-  featuresTitle3: '免费开源',
-  featuresText3: '标注免费可自定义',
-  footerTitle: '尽快实现你的想法',
-  demoDropDown: '试一试',
-  demoNER: '命名实体识别',
-  demoSent: '情感分析',
-  demoTranslation: '文本翻译',
-  demoTextToSQL: '语义解析Text-to-SQL'
-}
diff --git a/frontend/i18n/zh/zh/index.js b/frontend/i18n/zh/zh/index.js
deleted file mode 100644
index 0f1ae8e6..00000000
--- a/frontend/i18n/zh/zh/index.js
+++ /dev/null
@@ -1,35 +0,0 @@
-import home from './home'
-import header from './header'
-import generic from './generic'
-import rules from './rules'
-import toastui from './toastui'
-import user from './user'
-import vuetify from './vuetify'
-import annotation from './projects/annotation'
-import dataset from './projects/dataset'
-import errors from './projects/errors'
-import guideline from './projects/guideline'
-import projectHome from './projects/home'
-import labels from './projects/labels'
-import members from './projects/members'
-import overview from './projects/overview'
-import statistics from './projects/statistics'
-
-export default {
-  home,
-  header,
-  generic,
-  rules,
-  toastui,
-  user,
-  vuetify,
-  annotation,
-  dataset,
-  errors,
-  guideline,
-  projectHome,
-  labels,
-  members,
-  overview,
-  statistics
-}
diff --git a/frontend/i18n/zh/zh/projects/annotation.js b/frontend/i18n/zh/zh/projects/annotation.js
deleted file mode 100644
index dd142a54..00000000
--- a/frontend/i18n/zh/zh/projects/annotation.js
+++ /dev/null
@@ -1,14 +0,0 @@
-export default {
-  checkedTooltip: '已选',
-  notCheckedTooltip: '未选',
-  selectFilterTooltip: '过滤',
-  filterOption1: '全部',
-  filterOption2: '已标注',
-  filterOption3: '未标注',
-  guidelineTooltip: '显示指南',
-  guidelinePopupTitle: '标注指南',
-  metadataDefaultMessage: '没有数据可获得',
-  key: '键',
-  value: '值',
-  newText: '下一条'
-}
diff --git a/frontend/i18n/zh/zh/projects/dataset.js b/frontend/i18n/zh/zh/projects/dataset.js
deleted file mode 100644
index f3046a89..00000000
--- a/frontend/i18n/zh/zh/projects/dataset.js
+++ /dev/null
@@ -1,19 +0,0 @@
-export default {
-  dataset: '数据集',
-  actions: '操作',
-  importDataset: '导入数据集',
-  exportDataset: '导出数据集',
-  text: '文本',
-  metadata: '元数据',
-  action: '操作',
-  annotate: '标注',
-  importDataTitle: '上传数据',
-  importDataMessage1: '选择文件格式',
-  importDataMessage2: '选择一个文件',
-  importDataPlaceholder: '请导入文件',
-  exportDataTitle: '导出数据',
-  exportDataMessage: '请选择文件格式',
-  deleteDocumentsTitle: '删除文档',
-  deleteDocumentsMessage: '你确定要从这个项目中删除这些文档吗？',
-  pageText: '{0}-{1} of {2}'
-}
diff --git a/frontend/i18n/zh/zh/projects/errors.js b/frontend/i18n/zh/zh/projects/errors.js
deleted file mode 100644
index 933160e3..00000000
--- a/frontend/i18n/zh/zh/projects/errors.js
+++ /dev/null
@@ -1,5 +0,0 @@
-export default {
-  fileCannotUpload: '这个文件不能被上传，获取格式错误，请仔细检查文件格式',
-  labelCannotCreate: '这个标签不能被创建，你可能在其它的键上用了相同的标签名',
-  invalidUserOrPass: '用户名或者密码不正确'
-}
diff --git a/frontend/i18n/zh/zh/projects/guideline.js b/frontend/i18n/zh/zh/projects/guideline.js
deleted file mode 100644
index dedb79b6..00000000
--- a/frontend/i18n/zh/zh/projects/guideline.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export default {
-  guideline: '指南',
-  writeGuidelinePrompt: '请写入标注指南'
-}
diff --git a/frontend/i18n/zh/zh/projects/home.js b/frontend/i18n/zh/zh/projects/home.js
deleted file mode 100644
index 63d9faf4..00000000
--- a/frontend/i18n/zh/zh/projects/home.js
+++ /dev/null
@@ -1,11 +0,0 @@
-export default {
-  home: '主页',
-  welcome: '欢迎进入数据标注平台',
-  importData: '导入数据集',
-  createLabels: '为这个项目创建标签名',
-  addMembers: '添加成员',
-  defineGuideline: '定义指南',
-  annotateDataset: '标注数据集',
-  viewStatistics: '查看统计',
-  exportDataset: '导出数据集'
-}
diff --git a/frontend/i18n/zh/zh/projects/labels.js b/frontend/i18n/zh/zh/projects/labels.js
deleted file mode 100644
index 7439b2d5..00000000
--- a/frontend/i18n/zh/zh/projects/labels.js
+++ /dev/null
@@ -1,20 +0,0 @@
-export default {
-  labels: '标签',
-  shortkey: '键',
-  color: '颜色',
-  createLabel: '创建标签',
-  importLabels: '创建标签',
-  exportLabels: '导出标签',
-  labelName: '标签名',
-  labelMessage: '请输入标签名',
-  createLink: 'Create Link',
-  linkName: 'Link name',
-  linkMessage: 'Link name is required',
-  key: 'Key',
-  deleteLabel: '删除标签',
-  deleteMessage: '你确定要从这个项目中删除这些标签吗',
-  importTitle: '导入标签',
-  importMessage1: '样例格式',
-  importMessage2: '请选择一个文件',
-  filePlaceholder: '输入文件'
-}
diff --git a/frontend/i18n/zh/zh/projects/members.js b/frontend/i18n/zh/zh/projects/members.js
deleted file mode 100644
index 2ce9a525..00000000
--- a/frontend/i18n/zh/zh/projects/members.js
+++ /dev/null
@@ -1,16 +0,0 @@
-export default {
-  members: '成员',
-  role: '角色',
-  updateRole: '更行角色',
-  addMember: '添加成员',
-  userSearchAPIs: '用户搜索接口',
-  userSearchPrompt: '开始搜索',
-  removeMember: '移除成员',
-  removePrompt: '你确定要移除当前成员吗?',
-  roles: {
-    projectAdmin: '项目管理员',
-    annotator: '标注员',
-    annotationApprover: '审查员',
-    undefined: '角色未定义'
-  }
-}
diff --git a/frontend/i18n/zh/zh/projects/overview.js b/frontend/i18n/zh/zh/projects/overview.js
deleted file mode 100644
index 5a74b10b..00000000
--- a/frontend/i18n/zh/zh/projects/overview.js
+++ /dev/null
@@ -1,19 +0,0 @@
-export default {
-  createProjectTitle: '添加项目',
-  projectName: '项目名称',
-  projectType: '项目类型',
-  textClassification: '文本分类',
-  sequenceLabeling: '序列标注',
-  sequenceToSequence: '序列到序列',
-  randomizeDocOrder: '随机文档顺序',
-  shareAnnotations: '在所有用户共享标注',
-  delete: '删除',
-  deleteProjectTitle: '删除项目',
-  deleteProjectMessage: '你确定要删除这些项目吗？',
-  search: '搜索',
-  projectTypes: [
-    '文本分类',
-    '序列标注',
-    '序列到序列'
-  ]
-}
diff --git a/frontend/i18n/zh/zh/projects/statistics.js b/frontend/i18n/zh/zh/projects/statistics.js
deleted file mode 100644
index 602c70ce..00000000
--- a/frontend/i18n/zh/zh/projects/statistics.js
+++ /dev/null
@@ -1,9 +0,0 @@
-export default {
-  statistics: '统计',
-  progress: [
-    '已完成',
-    '未完成'
-  ],
-  labelStats: '标签统计',
-  userStats: '用户统计'
-}
diff --git a/frontend/i18n/zh/zh/rules.js b/frontend/i18n/zh/zh/rules.js
deleted file mode 100644
index 23914714..00000000
--- a/frontend/i18n/zh/zh/rules.js
+++ /dev/null
@@ -1,38 +0,0 @@
-export default {
-  colorRules: {
-    colorRequired: '请输入颜色'
-  },
-  labelNameRules: {
-    labelRequired: '请输入名称',
-    labelLessThan30Chars: '名称必须少于30个字符'
-  },
-  userNameRules: {
-    userNameRequired: '请输入用户名',
-    userNameLessThan30Chars: '用户名必须少于30个字符'
-  },
-  roleRules: {
-    roleRequired: '请输入角色'
-  },
-  projectNameRules: {
-    projectNameRequired: '请输入项目名称',
-    projectNameLessThan30Chars: '项目名称必须少于30个字符'
-  },
-  descriptionRules: {
-    descriptionRequired: '请输入描述',
-    descriptionLessThan30Chars: '描述必须少于100个字符'
-  },
-  projectTypeRules: {
-    projectTypeRequired: '请输入项目类型'
-  },
-  fileFormatRules: {
-    fileFormatRequired: '请输入文件类型'
-  },
-  uploadFileRules: {
-    fileRequired: '请输入文件',
-    fileLessThan1MB: '文件大小必须小于 1 MB!'
-  },
-  passwordRules: {
-    passwordRequired: '请输入密码',
-    passwordLessThan30Chars: '密码必须小于30个字符'
-  }
-}
diff --git a/frontend/i18n/zh/zh/toastui.js b/frontend/i18n/zh/zh/toastui.js
deleted file mode 100644
index 7d8afa93..00000000
--- a/frontend/i18n/zh/zh/toastui.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export default {
-  localeCode: 'zh_CN'
-}
diff --git a/frontend/i18n/zh/zh/user.js b/frontend/i18n/zh/zh/user.js
deleted file mode 100644
index d1b571ca..00000000
--- a/frontend/i18n/zh/zh/user.js
+++ /dev/null
@@ -1,6 +0,0 @@
-export default {
-  login: '登录',
-  signOut: '注销',
-  username: '用户名',
-  password: '密码'
-}
diff --git a/frontend/i18n/zh/zh/vuetify.js b/frontend/i18n/zh/zh/vuetify.js
deleted file mode 100644
index 8f6d2420..00000000
--- a/frontend/i18n/zh/zh/vuetify.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export default {
-  itemsPerPageText: '每页最多可显示',
-  noDataAvailable: '没有数据可获得'
-}