fcitx-ui-classic binary package in Ubuntu Bionic s390x

 Fcitx is a input method framework with extension support, which provides
 an interface for entering characters of different scripts in applications
 using a variety of mapping systems.
 .
 It offers a pleasant and modern experience, with intuitive graphical
 configuration tools and customizable skins and mapping tables. It is
 highly modularized and extensible, with GTK+ 2/3 and Qt4 IM Modules, support
 for UIs based on Fbterm, pure Xlib, GTK+, or KDE, and a developer-friendly
 API.
 .
 This package provides the classic user interface, which is suitable
 for most users. It also provides the following skins:
  * classic: Fcitx 3.x classic skin ported to new infrastructure
  * dark: the dark skin fits for dark desktop theme
  * default: the default skin

Source package