language.admin.css

.ckeditor5-toolbar-button-textPartLanguage {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 110px;
  color: #000;
}

.ckeditor5-toolbar-button-textPartLanguage::before {
  margin-left: 10px;
  /* For browsers which don't support alt content, eg FireFox */
  content: "Language";
  content: "Language" / "";
  font-size: 14px;
}

[dir="rtl"] .ckeditor5-toolbar-button-textPartLanguage::before {
  margin-right: 10px;
  margin-left: 0;
}

.ckeditor5-toolbar-button-textPartLanguage::after {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  content: "";
  transform: rotate(135deg);
  border-width: 2px 2px 0 0;
  border-style: solid;
}

[dir="rtl"] .ckeditor5-toolbar-button-textPartLanguage::after {
  margin-right: 0;
  margin-left: 10px;
}

File

core/modules/ckeditor5/css/language.admin.css

.ckeditor5-toolbar-button-textPartLanguage {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 110px;
  color: #000;
}

.ckeditor5-toolbar-button-textPartLanguage::before {
  margin-left: 10px;
  /* For browsers which don't support alt content, eg FireFox */
  content: "Language";
  content: "Language" / "";
  font-size: 14px;
}

[dir="rtl"] .ckeditor5-toolbar-button-textPartLanguage::before {
  margin-right: 10px;
  margin-left: 0;
}

.ckeditor5-toolbar-button-textPartLanguage::after {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 10px;
  content: "";
  transform: rotate(135deg);
  border-width: 2px 2px 0 0;
  border-style: solid;
}

[dir="rtl"] .ckeditor5-toolbar-button-textPartLanguage::after {
  margin-right: 0;
  margin-left: 10px;
}