diff --git a/src/activities/lang/resource/content-cs.json b/src/activities/lang/resource/content-cs.json
deleted file mode 100644
index 13e02ed54..000000000
--- a/src/activities/lang/resource/content-cs.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-    "alphabet.ogg": "abeceda",
-    "angel.ogg": "anděl"
-}
\ No newline at end of file
diff --git a/src/activities/lang/resource/content-ja.json b/src/activities/lang/resource/content-ja.json
deleted file mode 100644
index 9e26dfeeb..000000000
--- a/src/activities/lang/resource/content-ja.json
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file
diff --git a/src/activities/lang/resource/content-lt.json b/src/activities/lang/resource/content-lt.json
deleted file mode 100644
index 9e26dfeeb..000000000
--- a/src/activities/lang/resource/content-lt.json
+++ /dev/null
@@ -1 +0,0 @@
-{}
\ No newline at end of file