diff --git a/src/locales/cs-CZ.json b/src/locales/cs-CZ.json
index df30e806..9cd29449 100644
--- a/src/locales/cs-CZ.json
+++ b/src/locales/cs-CZ.json
@@ -51,10 +51,10 @@
     "medium": "Střední",
     "large": "Velké",
     "veryLarge": "Velmi velké",
-    "solid": "",
+    "solid": "Plný",
     "hachure": "",
     "crossHatch": "",
-    "thin": "",
+    "thin": "Tenký",
     "bold": "",
     "left": "",
     "center": "",
@@ -68,7 +68,7 @@
     "canvasColors": "",
     "canvasBackground": "Pozadí plátna",
     "drawingCanvas": "",
-    "layers": "",
+    "layers": "Vrstvy",
     "actions": "",
     "language": "",
     "liveCollaboration": "",
@@ -87,16 +87,16 @@
     "libraries": "",
     "loadingScene": "",
     "align": "",
-    "alignTop": "",
-    "alignBottom": "",
-    "alignLeft": "",
-    "alignRight": "",
+    "alignTop": "Zarovnat nahoru",
+    "alignBottom": "Zarovnat dolů",
+    "alignLeft": "Zarovnat vlevo",
+    "alignRight": "Zarovnejte vpravo",
     "centerVertically": "",
     "centerHorizontally": "",
     "distributeHorizontally": "",
     "distributeVertically": "",
-    "flipHorizontal": "",
-    "flipVertical": "",
+    "flipHorizontal": "Převrátit vodorovně",
+    "flipVertical": "Převrátit svisle",
     "viewMode": "Náhled",
     "toggleExportColorScheme": "",
     "share": "Sdílet",
diff --git a/src/locales/ja-JP.json b/src/locales/ja-JP.json
index caa417a5..0ff69cff 100644
--- a/src/locales/ja-JP.json
+++ b/src/locales/ja-JP.json
@@ -121,12 +121,12 @@
       "unlockAll": "すべてのロックを解除"
     },
     "statusPublished": "公開済み",
-    "sidebarLock": ""
+    "sidebarLock": "サイドバーを開いたままにする"
   },
   "library": {
-    "noItems": "",
-    "hint_emptyLibrary": "",
-    "hint_emptyPrivateLibrary": ""
+    "noItems": "まだアイテムが追加されていません…",
+    "hint_emptyLibrary": "キャンバス上のアイテムを選択してここに追加するか、以下の公開リポジトリからライブラリをインストールしてください。",
+    "hint_emptyPrivateLibrary": "キャンバス上のアイテムを選択すると、ここに追加されます。"
   },
   "buttons": {
     "clearReset": "キャンバスのリセット",
diff --git a/src/locales/percentages.json b/src/locales/percentages.json
index b1557801..3baa393e 100644
--- a/src/locales/percentages.json
+++ b/src/locales/percentages.json
@@ -3,7 +3,7 @@
   "bg-BG": 58,
   "bn-BD": 0,
   "ca-ES": 97,
-  "cs-CZ": 24,
+  "cs-CZ": 27,
   "da-DK": 34,
   "de-DE": 100,
   "el-GR": 82,
@@ -19,7 +19,7 @@
   "hu-HU": 94,
   "id-ID": 100,
   "it-IT": 100,
-  "ja-JP": 98,
+  "ja-JP": 100,
   "kab-KAB": 95,
   "kk-KZ": 22,
   "ko-KR": 98,