diff --git a/i18n/ja.po b/i18n/ja.po
index 74f07f0de1..85e95c83aa 100644
--- a/i18n/ja.po
+++ b/i18n/ja.po
@@ -12,7 +12,8 @@ msgstr ""
 "Report-Msgid-Bugs-To: avogadro-devel@lists.sourceforge.net\n"
 "POT-Creation-Date: 2024-06-30 02:14+0000\n"
 "PO-Revision-Date: 2024-08-28 03:53+0000\n"
-"Last-Translator: Eisuke Kawashima <e.kawaschima+weblate@gmail.com>\n"
+"Last-Translator: Weblate Translation Memory <noreply-mt-weblate-translation-"
+"memory@weblate.org>\n"
 "Language-Team: Japanese <https://hosted.weblate.org/projects/avogadro/"
 "avogadrolibs/ja/>\n"
 "Language: ja\n"
@@ -7632,7 +7633,7 @@ msgstr "X軸の最大値:"
 #. i18n: file: qtplugins/spectra/spectradialog.ui:132
 #. i18n: ectx: property (text), widget (QLabel, label_12)
 msgid "Offset:"
-msgstr ""
+msgstr "オフセット:"
 
 #. i18n: file: qtplugins/spectra/spectradialog.ui:139
 #. i18n: ectx: property (text), widget (QLabel, label_10)
@@ -7722,12 +7723,12 @@ msgstr "10"
 #. i18n: file: qtplugins/spectra/spectradialog.ui:411
 #. i18n: ectx: property (text), item, widget (QComboBox, fontSizeCombo)
 msgid "12"
-msgstr ""
+msgstr "12"
 
 #. i18n: file: qtplugins/spectra/spectradialog.ui:416
 #. i18n: ectx: property (text), item, widget (QComboBox, fontSizeCombo)
 msgid "14"
-msgstr ""
+msgstr "14"
 
 #. i18n: file: qtplugins/spectra/spectradialog.ui:421
 #. i18n: ectx: property (text), item, widget (QComboBox, fontSizeCombo)