diff --git a/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/en_us.json b/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/en_us.json
new file mode 100644
index 00000000000..9182e72573d
--- /dev/null
+++ b/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/en_us.json
@@ -0,0 +1,30 @@
+{
+  "flashback.select_replay": "Select Replay",
+  "flashback.select_replay.open": "Open Replay",
+  "flashback.select_replay.loading_replays": "Loading Replays",
+  "flashback.select_replay.replay": "Replay",
+  "flashback.select_replay.data_read": "Reading replay data...",
+  "flashback.select_replay.delete_question": "Are you sure you want to delete this replay?",
+  "flashback.select_replay.duration": "Duration: %s",
+
+  "flashback.option.per_second": "%s/s",
+
+  "flashback.option.automatically_start": "Automatically Start",
+  "flashback.option.automatically_start.description": "Automatically starts a replay recording when joining a world/server",
+  "flashback.option.automatically_finish": "Automatically Finish",
+  "flashback.option.automatically_finish.description": "Automatically finishes a replay recording when exiting the world/server",
+  "flashback.option.show_recording_toasts": "Show Recording Toasts",
+  "flashback.option.show_recording_toasts.description": "Show toasts in the top right when starting/stopping a replay recording",
+  "flashback.option.quicksave": "Quicksave",
+  "flashback.option.quicksave.description": "Save the replay with default values instead of opening the Save Replay screen",
+  "flashback.option.hide_pause_menu_controls": "Hide Pause Controls",
+  "flashback.option.hide_pause_menu_controls.description": "Hide Pause (ESC) menu controls for starting/finishing a replay. The commands will still work",
+  "flashback.option.mark_dimension_changes": "Mark Dimension Changes",
+  "flashback.option.mark_dimension_changes.description": "Automatically add a marker to the replay when switching dimensions",
+  "flashback.option.record_hotbar": "Record Hotbar",
+  "flashback.option.record_hotbar.description": "Adds first-person hotbar information into the replay",
+  "flashback.option.local_player_updates_per_second": "First-person Updates",
+  "flashback.option.local_player_updates_per_second.description": "The update rate per second for the position/angle of the first-person player",
+  "flashback.option.record_voice_chat": "Record Voice Chat",
+  "flashback.option.record_voice_chat.description": "Adds voice chat from SimpleVoiceChat into the replay"
+}
diff --git a/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/zh_cn.json b/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/zh_cn.json
new file mode 100644
index 00000000000..80380a6b57a
--- /dev/null
+++ b/projects/1.21-fabric/assets/modrinth-flashback/flashback/lang/zh_cn.json
@@ -0,0 +1,28 @@
+{
+  "flashback.select_replay": "选择回放",
+  "flashback.select_replay.open": "打开回放",
+  "flashback.select_replay.loading_replays": "正在加载回放",
+  "flashback.select_replay.replay": "回放",
+  "flashback.select_replay.data_read": "读取回放数据中……",
+  "flashback.select_replay.delete_question": "你确定你要删除这个回放吗？",
+  "flashback.select_replay.duration": "时长：%s",
+  "flashback.option.per_second": "%s/秒",
+  "flashback.option.automatically_start": "自动开始",
+  "flashback.option.automatically_start.description": "加入世界/服务器时自动开始回放录制",
+  "flashback.option.automatically_finish": "自动结束",
+  "flashback.option.automatically_finish.description": "离开世界/服务器时自动完成回放录制",
+  "flashback.option.show_recording_toasts": "显示录制弹窗",
+  "flashback.option.show_recording_toasts.description": "开始/停止回放录制时在右上角显示录制弹窗",
+  "flashback.option.quicksave": "快速保存",
+  "flashback.option.quicksave.description": "使用默认值保存回放，而不会打开“保存回放”屏幕",
+  "flashback.option.hide_pause_menu_controls": "隐藏菜单按钮",
+  "flashback.option.hide_pause_menu_controls.description": "隐藏位于ESC菜单中用于开始/结束回放录制的按钮。但仍然可以使用指令控制",
+  "flashback.option.mark_dimension_changes": "标记所在维度的变化",
+  "flashback.option.mark_dimension_changes.description": "切换维度时自动在回放中标记维度变化",
+  "flashback.option.record_hotbar": "录制HUD",
+  "flashback.option.record_hotbar.description": "在回放中添加第一人称HUD信息",
+  "flashback.option.local_player_updates_per_second": "第一人称更新频率",
+  "flashback.option.local_player_updates_per_second.description": "第一人称玩家的位置/角度的每秒更新频率",
+  "flashback.option.record_voice_chat": "录制语音聊天",
+  "flashback.option.record_voice_chat.description": "在回放中添加SimpleVoiceChat的语音聊天"
+}
\ No newline at end of file