diff --git a/lang/translations/sl.po b/lang/translations/sl.po
new file mode 100644
index 0000000..49ee243
--- /dev/null
+++ b/lang/translations/sl.po
@@ -0,0 +1,41 @@
+# Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
+#
+#                                     !!! IMPORTANT !!!
+#
+#         Before you edit this file, please keep in mind that contributing to the project
+#                translations is possible ONLY via the Transifex online service.
+#
+#         To submit your translations, visit https://www.transifex.com/ckeditor/ckeditor5.
+#
+#                   To learn more, check out the official contributor's guide:
+#     https://ckeditor.com/docs/ckeditor5/latest/framework/guides/contributing/contributing.html
+#
+msgid ""
+msgstr ""
+"Language-Team: Slovenian (https://www.transifex.com/ckeditor/teams/11143/sl/)\n"
+"Language: sl\n"
+"Plural-Forms: nplurals=4; plural=(n%100==1 ? 0 : n%100==2 ? 1 : n%100==3 || n%100==4 ? 2 : 3);\n"
+
+msgctxt "Toolbar button tooltip for aligning the text to the left."
+msgid "Align left"
+msgstr "Poravnava levo"
+
+msgctxt "Toolbar button tooltip for aligning the text to the right."
+msgid "Align right"
+msgstr "Poravnava desno"
+
+msgctxt "Toolbar button tooltip for aligning the text to center."
+msgid "Align center"
+msgstr "Sredinska poravnava"
+
+msgctxt "Toolbar button tooltip for making the text justified."
+msgid "Justify"
+msgstr "Postavi na sredino"
+
+msgctxt "Dropdown button tooltip for the text alignment feature."
+msgid "Text alignment"
+msgstr "Poravnava besedila"
+
+msgctxt "Label used by assistive technologies describing the text alignment feature toolbar."
+msgid "Text alignment toolbar"
+msgstr "Orodna vrstica besedila"
diff --git a/lang/translations/uk.po b/lang/translations/uk.po
index a2932c4..666213e 100644
--- a/lang/translations/uk.po
+++ b/lang/translations/uk.po
@@ -38,4 +38,4 @@ msgstr "Вирівнювання тексту"
 
 msgctxt "Label used by assistive technologies describing the text alignment feature toolbar."
 msgid "Text alignment toolbar"
-msgstr ""
+msgstr "Панель інструментів вирівнювання тексту"
diff --git a/lang/translations/vi.po b/lang/translations/vi.po
index fd96e54..9d4775f 100644
--- a/lang/translations/vi.po
+++ b/lang/translations/vi.po
@@ -38,4 +38,4 @@ msgstr "Căn chỉnh văn bản"
 
 msgctxt "Label used by assistive technologies describing the text alignment feature toolbar."
 msgid "Text alignment toolbar"
-msgstr ""
+msgstr "Thanh công cụ canh chữ"