Fcitx5 app Supported languages English (with spellcheck) Chinese (Pinyin, Shuangpin, Wubi, Cangjie and custom tables) Vietnamese (Based on UniKey, supports Telex, VNI and VIQR) Features Virtual Keyboard (layout not customizable yet) Expandable candidate view Clipboard management (plain text only) Theming (custom color scheme and background image) Popup preview on key press Long press popup keyboard for convenient symbol input Symbol and Emoji picker