Fill tool docs & ensuring PO translations

And also grabbing txt versions of recent fr_FR updates.

src/po/ko.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: tuxpaint\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-02-20 17:52-0800\n"
+"POT-Creation-Date: 2021-02-20 20:40-0800\n"
 "PO-Revision-Date: 2015-10-09 20:33-0400\n"
 "Last-Translator: Mark K. Kim <mkkim214@gmail.com>\n"
 "Language-Team: N/A\n"
@@ -180,6 +180,38 @@ msgstr "<9>spare-9a"
 msgid "<9>spare-9b"
 msgstr "<9>spare-9b"
 
+#: ../fill_tools.h:49
+msgid "Solid"
+msgstr ""
+
+#: ../fill_tools.h:50
+#, fuzzy
+#| msgid "Lines"
+msgid "Linear"
+msgstr "줄"
+
+#: ../fill_tools.h:51
+msgid "Radial"
+msgstr ""
+
+#: ../fill_tools.h:55
+#, fuzzy
+#| msgid "Click in the picture to fill that area with color."
+msgid "Click to fill an area with a solid color."
+msgstr "마우스를 누르면 물통을 엎을 수 있어요!"
+
+#: ../fill_tools.h:56
+msgid ""
+"Click and drag to fill an area with a linear gradient (from the chosen color "
+"to transparent)."
+msgstr ""
+
+#: ../fill_tools.h:57
+msgid ""
+"Click to fill an area with a radial gradient (from the chosen color to "
+"transparent)."
+msgstr ""
+
 #. Congratulations #1
 #: ../great.h:37
 msgid "Great!"