diff -Nru kmplot-18.12.0/debian/changelog kmplot-18.12.1/debian/changelog
--- kmplot-18.12.0/debian/changelog	2019-01-05 16:50:28.000000000 +0000
+++ kmplot-18.12.1/debian/changelog	2019-01-10 14:12:09.000000000 +0000
@@ -1,3 +1,9 @@
+kmplot (4:18.12.1-0ubuntu1) disco; urgency=medium
+
+  * New upstream release (18.12.1)
+
+ -- Rik Mills <rikmills@kubuntu.org>  Thu, 10 Jan 2019 14:12:09 +0000
+
 kmplot (4:18.12.0-0ubuntu1) disco; urgency=medium
 
   * New upstream beta release (18.11.80)
diff -Nru kmplot-18.12.0/org.kde.kmplot.appdata.xml kmplot-18.12.1/org.kde.kmplot.appdata.xml
--- kmplot-18.12.0/org.kde.kmplot.appdata.xml	2018-12-03 06:12:42.000000000 +0000
+++ kmplot-18.12.1/org.kde.kmplot.appdata.xml	2018-12-16 06:13:47.000000000 +0000
@@ -101,11 +101,13 @@
       <caption xml:lang="es">Función cuadrática, su derivada e integral dibujadas con KmPlot</caption>
       <caption xml:lang="gl">Función cuadrática, coa súa derivada e integral representadas con KmPlot</caption>
       <caption xml:lang="nl">Kwadratische functie, zijn afgeleide en integraal geplot met KmPlot</caption>
+      <caption xml:lang="pl">Funkcja kwadratowa, jej różniczka i całka narysowane w KmPlot</caption>
       <caption xml:lang="pt">Função quadrática, a sua derivada e o seu integral desenhados no KmPlot</caption>
       <caption xml:lang="pt-BR">Função quadrática, sua derivada e integral desenhada com o KmPlot</caption>
       <caption xml:lang="sv">Kvadratisk funktion, dess derivata och integral uppritade med Kmplot</caption>
       <caption xml:lang="uk">Квадратична функція, її похідна та інтеграл на кресленні KmPlot</caption>
       <caption xml:lang="x-test">xxQuadratic function, its derivative and integral plotted with KmPlotxx</caption>
+      <caption xml:lang="zh-CN">二次函数，其导数和积分用 KmPlot 绘制</caption>
       <caption xml:lang="zh-TW">使用 KmPlot 繪製二次函數、其延伸物和積分</caption>
       <image>http://edu.kde.org/images/screenshots/kmplot.png</image>
     </screenshot>
diff -Nru kmplot-18.12.0/po/it/kmplot.po kmplot-18.12.1/po/it/kmplot.po
--- kmplot-18.12.0/po/it/kmplot.po	2018-12-07 00:19:31.000000000 +0000
+++ kmplot-18.12.1/po/it/kmplot.po	2019-01-08 00:06:27.000000000 +0000
@@ -1,14 +1,14 @@
 # translation of kmplot.po to Italian
 # Copyright (C) 2002,2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 Free Software Foundation, Inc.
 # Davide Rizzo <rizzo@merate.mi.astro.it>, 2002,2003, 2004.
-# Pino Toscano <toscano.pino@tiscali.it>, 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2014, 2015, 2017.
+# Pino Toscano <toscano.pino@tiscali.it>, 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2014, 2015, 2017, 2018.
 #
 msgid ""
 msgstr ""
 "Project-Id-Version: kmplot\n"
 "Report-Msgid-Bugs-To: http://bugs.kde.org\n"
 "POT-Creation-Date: 2018-11-22 07:35+0100\n"
-"PO-Revision-Date: 2017-07-15 16:05+0200\n"
+"PO-Revision-Date: 2018-12-22 18:09+0100\n"
 "Last-Translator: Pino Toscano <toscano.pino@tiscali.it>\n"
 "Language-Team: Italian <kde-i18n-it@kde.org>\n"
 "Language: it\n"
@@ -983,14 +983,9 @@
 msgstr "Impossibile trovare il componente di KmPlot."
 
 #: kmplot.cpp:202 maindlg.cpp:512
-#, fuzzy, kde-format
-#| msgid ""
-#| "*.fkt|KmPlot Files (*.fkt)\n"
-#| "*|All Files"
+#, kde-format
 msgid "KmPlot Files (*.fkt);;All Files (*)"
-msgstr ""
-"*.fkt|File KmPlot (*.fkt)\n"
-"*|Tutti i file"
+msgstr "File KmPlot (*.fkt);;Tutti i file (*)"
 
 #: kmplot.cpp:202
 #, kde-format
@@ -1530,22 +1525,19 @@
 msgstr "Editor dei parametri"
 
 #: kparametereditor.cpp:225
-#, fuzzy, kde-format
-#| msgid "Parameter Editor"
+#, kde-format
 msgid "Open Parameter File"
-msgstr "Editor dei parametri"
+msgstr "Apri file dei parametri"
 
 #: kparametereditor.cpp:225 kparametereditor.cpp:300
-#, fuzzy, kde-format
-#| msgid "*.txt|Plain Text File "
+#, kde-format
 msgid "Plain Text File (*.txt)"
-msgstr "*.txt|File di testo semplice"
+msgstr "File di testo semplice (*.txt)"
 
 #: kparametereditor.cpp:242
-#, fuzzy, kde-format
-#| msgid "An error appeared when opening this file (%1)"
+#, kde-format
 msgid "An error appeared when opening this file: %1"
-msgstr "Si è verificato un errore durante l'apertura di questo file (%1)"
+msgstr "Si è verificato un errore durante l'apertura di questo file: %1"
 
 #: kparametereditor.cpp:276
 #, kde-format
@@ -1577,10 +1569,9 @@
 msgstr "Si è verificato un errore durante l'apertura di questo file."
 
 #: kparametereditor.cpp:300
-#, fuzzy, kde-format
-#| msgid "Save As"
+#, kde-format
 msgid "Save File"
-msgstr "Salva come"
+msgstr "Salva file"
 
 #: kparametereditor.cpp:304
 #, kde-format
@@ -1936,18 +1927,12 @@
 msgstr "Impossibile salvare il file"
 
 #: maindlg.cpp:552
-#, fuzzy, kde-format
-#| msgid ""
-#| "\n"
-#| "*.svg|Scalable Vector Graphics"
+#, kde-format
 msgid "Scalable Vector Graphics (*.svg)"
-msgstr ""
-"\n"
-"*.svg|Grafica vettoriale riscalabile"
+msgstr "Grafica vettoriale riscalabile (*.svg)"
 
 #: maindlg.cpp:554
-#, fuzzy, kde-format
-#| msgid "Export as Image"
+#, kde-format
 msgctxt "@title:window"
 msgid "Export as Image"
 msgstr "Esporta come immagine"
@@ -3006,7 +2991,7 @@
 #, kde-format
 msgctxt "%1=minimum value, %2=maximum value"
 msgid "%1 to %2"
-msgstr ""
+msgstr "da %1 a %2"
 
 #: view.cpp:2390
 #, kde-format
diff -Nru kmplot-18.12.0/po/pl/kmplot.po kmplot-18.12.1/po/pl/kmplot.po
--- kmplot-18.12.0/po/pl/kmplot.po	2018-12-07 00:19:31.000000000 +0000
+++ kmplot-18.12.1/po/pl/kmplot.po	2019-01-08 00:06:28.000000000 +0000
@@ -11,7 +11,7 @@
 "Project-Id-Version: kmplot\n"
 "Report-Msgid-Bugs-To: http://bugs.kde.org\n"
 "POT-Creation-Date: 2018-11-22 07:35+0100\n"
-"PO-Revision-Date: 2018-10-14 11:16+0100\n"
+"PO-Revision-Date: 2018-12-16 05:29+0100\n"
 "Last-Translator: Łukasz Wojniłowicz <lukasz.wojnilowicz@gmail.com>\n"
 "Language-Team: Polish <kde-i18n-doc@kde.org>\n"
 "Language: pl\n"
@@ -2978,7 +2978,7 @@
 #, kde-format
 msgctxt "%1=minimum value, %2=maximum value"
 msgid "%1 to %2"
-msgstr ""
+msgstr "%1 do %2"
 
 #: view.cpp:2390
 #, kde-format
diff -Nru kmplot-18.12.0/po/zh_CN/kmplot.po kmplot-18.12.1/po/zh_CN/kmplot.po
--- kmplot-18.12.0/po/zh_CN/kmplot.po	2018-12-07 00:19:32.000000000 +0000
+++ kmplot-18.12.1/po/zh_CN/kmplot.po	2019-01-08 00:06:28.000000000 +0000
@@ -13,7 +13,7 @@
 "Project-Id-Version: kdeorg\n"
 "Report-Msgid-Bugs-To: http://bugs.kde.org\n"
 "POT-Creation-Date: 2018-11-22 07:35+0100\n"
-"PO-Revision-Date: 2018-11-12 09:27\n"
+"PO-Revision-Date: 2019-01-05 20:54\n"
 "Last-Translator: guoyunhe <i@guoyunhe.me>\n"
 "Language-Team: Chinese Simplified\n"
 "Language: zh_CN\n"
@@ -973,14 +973,9 @@
 msgstr "找不到 KmPlot 部件。"
 
 #: kmplot.cpp:202 maindlg.cpp:512
-#, fuzzy, kde-format
-#| msgid ""
-#| "*.fkt|KmPlot Files (*.fkt)\n"
-#| "*|All Files"
+#, kde-format
 msgid "KmPlot Files (*.fkt);;All Files (*)"
-msgstr ""
-"*.fkt|KmPlot 文件 (*.fkt)\n"
-"*|所有文件"
+msgstr "KmPlot 文件 (*.fkt);;所有文件 (*)"
 
 #: kmplot.cpp:202
 #, kde-format
@@ -1514,22 +1509,19 @@
 msgstr "参数编辑器"
 
 #: kparametereditor.cpp:225
-#, fuzzy, kde-format
-#| msgid "Parameter Editor"
+#, kde-format
 msgid "Open Parameter File"
-msgstr "参数编辑器"
+msgstr "打开参数文件"
 
 #: kparametereditor.cpp:225 kparametereditor.cpp:300
-#, fuzzy, kde-format
-#| msgid "*.txt|Plain Text File "
+#, kde-format
 msgid "Plain Text File (*.txt)"
-msgstr "*.txt|纯文本文件"
+msgstr "纯文本文件 (*.txt)"
 
 #: kparametereditor.cpp:242
-#, fuzzy, kde-format
-#| msgid "An error appeared when opening this file (%1)"
+#, kde-format
 msgid "An error appeared when opening this file: %1"
-msgstr "打开此文件(%1)时出错"
+msgstr "打开此文件时出错：%1"
 
 #: kparametereditor.cpp:276
 #, kde-format
@@ -1559,10 +1551,9 @@
 msgstr "打开此文件时出错"
 
 #: kparametereditor.cpp:300
-#, fuzzy, kde-format
-#| msgid "Save As"
+#, kde-format
 msgid "Save File"
-msgstr "另存为"
+msgstr "保存文件"
 
 #: kparametereditor.cpp:304
 #, kde-format
@@ -1914,18 +1905,12 @@
 msgstr "无法保存文件"
 
 #: maindlg.cpp:552
-#, fuzzy, kde-format
-#| msgid ""
-#| "\n"
-#| "*.svg|Scalable Vector Graphics"
+#, kde-format
 msgid "Scalable Vector Graphics (*.svg)"
-msgstr ""
-"\n"
-"*.svg|可缩放矢量图形"
+msgstr "可缩放矢量图形 (*. svg)"
 
 #: maindlg.cpp:554
-#, fuzzy, kde-format
-#| msgid "Export as Image"
+#, kde-format
 msgctxt "@title:window"
 msgid "Export as Image"
 msgstr "导出为图像"
@@ -2950,7 +2935,7 @@
 #, kde-format
 msgctxt "%1=minimum value, %2=maximum value"
 msgid "%1 to %2"
-msgstr ""
+msgstr "%1 至 %2"
 
 #: view.cpp:2390
 #, kde-format
@@ -2986,9 +2971,3 @@
 #, kde-format
 msgid "Error in extension."
 msgstr "扩展中出错。"
-
-#~ msgid "Sorry, this file format is not supported."
-#~ msgstr "对不起，这种文件格式不被支持。"
-
-#~ msgid "  to  "
-#~ msgstr "  到  "
diff -Nru kmplot-18.12.0/po/zh_TW/kmplot.po kmplot-18.12.1/po/zh_TW/kmplot.po
--- kmplot-18.12.0/po/zh_TW/kmplot.po	2018-12-07 00:19:32.000000000 +0000
+++ kmplot-18.12.1/po/zh_TW/kmplot.po	2019-01-08 00:06:28.000000000 +0000
@@ -1,14 +1,13 @@
 # translation of kmplot.po to Chinese Traditional
 # Copyright (C) 2002, 2006, 2007 Free Software Foundation, Inc.
-#
 # Sarah Smith <sarahs@redhat.com>, 2002.
 # Xiong Jiang <jxiong@offtopic.org>, 2002.
 # Funda Wang <fundawang@linux.net.cn>, 2004.
+# Franklin Weng <franklin@goodhorse.idv.tw>, 2010, 2011, 2015, 2017.
+# pan93412 <pan93412@gmail.com>, 2018.
+#
 # Frank Weng (a.k.a. Franklin) <franklin at goodhorse dot idv dot tw>, 2006, 2010.
 # Franklin Weng <franklin at goodhorse dot idv dot tw>, 2007.
-# Franklin Weng <franklin@mail.everfocus.com.tw>, 2010.
-# Franklin Weng <franklin@goodhorse.idv.tw>, 2011, 2015, 2017.
-# pan93412 <pan93412@gmail.com>, 2018.
 msgid ""
 msgstr ""
 "Project-Id-Version: kmplot\n"
@@ -2971,9 +2970,3 @@
 #, kde-format
 msgid "Error in extension."
 msgstr "擴展中發生錯誤。"
-
-#~ msgid "  to  "
-#~ msgstr "  到  "
-
-#~ msgid "Sorry, this file format is not supported."
-#~ msgstr "抱歉，此檔案格式尚未支援。"