Translate Shell (formerly Google Translate CLI) is a command-line
translator powered by Google Translate (default), Bing Translator,
Yandex.Translate, and Apertium.

If you prefer zsh over bash:

 TARGET=zsh ./translate-shell.SlackBuild

Recommended dependencies:
 * curl with OpenSSL support.
 * GNU FriBidi: for displaying text in Right-to-Left scripts
 (e.g. Arabic, Hebrew).
 * mplayer, mpv, mpg123 or eSpeak: for the Text-to-Speech functionality.
 * less, more or most: for terminal paging.
 * rlwrap: for readline-style editing and history in the interactive
 shell.
 * aspell or hunspell: for spell checking.

Recommended fonts:
https://github.com/soimort/translate-shell/wiki/Writing-Systems-and-Fonts#unicode-fonts