• soimort/translate\-shell: Command\-line translator using Google Translate, Bing Translator, Yandex\.Translate, etc\.

$ sudo apt install translate-shell
$ trans -H
Usage:  trans [OPTIONS] [SOURCES]:[TARGETS] [TEXT]...

Information options:
    -V, -version
        Print version and exit.
    -H, -help
        Print help message and exit.
    -M, -man
        Show man page and exit.
    -T, -reference
        Print reference table of languages and exit.
    -R, -reference-english
        Print reference table of languages (in English names) and exit.
    -L CODES, -list CODES
        Print details of languages and exit.
    -S, -list-engines
        List available translation engines and exit.
    -U, -upgrade
        Check for upgrade of this program.

Translator options:
    -e ENGINE, -engine ENGINE
        Specify the translation engine to use.

Display options:
    -verbose
        Verbose mode. (default)
    -b, -brief
        Brief mode.
    -d, -dictionary
        Dictionary mode.
    -identify
        Language identification.
    -show-original Y/n
        Show original text or not.
    -show-original-phonetics Y/n
        Show phonetic notation of original text or not.
    -show-translation Y/n
        Show translation or not.
    -show-translation-phonetics Y/n
        Show phonetic notation of translation or not.
    -show-prompt-message Y/n
        Show prompt message or not.
    -show-languages Y/n
        Show source and target languages or not.
    -show-original-dictionary y/N
        Show dictionary entry of original text or not.
    -show-dictionary Y/n
        Show dictionary entry of translation or not.
    -show-alternatives Y/n
        Show alternative translations or not.
    -w NUM, -width NUM
        Specify the screen width for padding.
    -indent NUM
        Specify the size of indent (number of spaces).
    -theme FILENAME
        Specify the theme to use.
    -no-theme
        Do not use any other theme than default.
    -no-ansi
        Do not use ANSI escape codes.
    -no-autocorrect
        Do not autocorrect. (if defaulted by the translation engine)
    -no-bidi
        Do not convert bidirectional texts.
    -bidi
        Always convert bidirectional texts.
    -no-warn
        Do not write warning messages to stderr.
    -dump
        Print raw API response instead.

Audio options:
    -p, -play
        Listen to the translation.
    -speak
        Listen to the original text.
    -n VOICE, -narrator VOICE
        Specify the narrator, and listen to the translation.
    -player PROGRAM
        Specify the audio player to use, and listen to the translation.
    -no-play
        Do not listen to the translation.
    -no-translate
        Do not translate anything when using -speak.
    -download-audio
        Download the audio to the current directory.
    -download-audio-as FILENAME
        Download the audio to the specified file.

Terminal paging and browsing options:
    -v, -view
        View the translation in a terminal pager.
    -pager PROGRAM
        Specify the terminal pager to use, and view the translation.
    -no-view, -no-pager
        Do not view the translation in a terminal pager.
    -browser PROGRAM
        Specify the web browser to use.
    -no-browser
        Do not open the web browser.

Networking options:
    -x HOST:PORT, -proxy HOST:PORT
        Use HTTP proxy on given port.
    -u STRING, -user-agent STRING
        Specify the User-Agent to identify as.
    -4, -ipv4, -inet4-only
        Connect only to IPv4 addresses.
    -6, -ipv6, -inet6-only
        Connect only to IPv6 addresses.

Interactive shell options:
    -I, -interactive, -shell
        Start an interactive shell.
    -E, -emacs
        Start the GNU Emacs front-end for an interactive shell.
    -no-rlwrap
        Do not invoke rlwrap when starting an interactive shell.

I/O options:
    -i FILENAME, -input FILENAME
        Specify the input file.
    -o FILENAME, -output FILENAME
        Specify the output file.

Language preference options:
    -l CODE, -hl CODE, -lang CODE
        Specify your home language.
    -s CODES, -sl CODES, -source CODES, -from CODES
        Specify the source language(s), joined by '+'.
    -t CODES, -tl CODES, -target CODES, -to CODES
        Specify the target language(s), joined by '+'.

Text preprocessing options:
    -j, -join-sentence
        Treat all arguments as one single sentence.

Other options:
    -no-init
        Do not load any initialization script.

See the man page trans(1) for more information.

$ trans -s ja -t ja -b -p こんにちは

対応エンジン

$ trans -list-engines
  aspell
* google
  bing
  spell
  hunspell
  apertium
  yandex

日本語対応ttsはGoogleのみ?

$ trans -e aspell -s ja -t ja -b -p こんにちは
[ERROR] No dictionary for language: ja
$ trans -e bing -s ja -t ja -b -p こんにちは

Voice output isn't available for Japanese
$ trans -e spell -s ja -t ja -b -p こんにちは
[ERROR] No dictionary for language: ja
$ trans -e hunspell -s ja -t ja -b -p こんにちは
[ERROR] No dictionary for language: ja
$ trans -e apertium -s ja -t ja -b -p こんにちは

Voice output isn't available for Japanese
$ trans -e yandex -s ja -t ja -b -p こんにちは
[ERROR] Session is invalid