Other: Updated translations. [skip ci]

Author: Reinmar

lang/translations/vi.po

@@ -0,0 +1,14 @@
+# Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
+msgid ""
+msgstr ""
+"Language-Team: Vietnamese (https://www.transifex.com/ckeditor/teams/11143/vi/)\n"
+"Language: vi\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+
+msgctxt "Toolbar button tooltip for the Undo feature."
+msgid "Undo"
+msgstr "Hoàn tác"
+
+msgctxt "Toolbar button tooltip for the Redo feature."
+msgid "Redo"
+msgstr "Tiếp tục"