Bash: Add languages to Chromium - bash

Question

Is it possibe to use Bash to add languages to Chromium? That is, do the equivalent of going to Settings - Advanced - Languages in the Chromium GUI, activate the languages you want, and then activate spell-checking for the same languages? Had a look at this, but there doesn't seem to be anything that fits the bill.

Answer 1

Figured it out. The best way seems to be to add a Python block to read and manipulate the Preferences-file using the JSON library. Before you do anything, you need to get your bearings in the Preferences-file. What are the relevant elements that you need to change?
If you go to Preferences in the Chromium GUI, you can see that there are two relevant settings:
1) Languages:
2) Dictionaries (for spell check):
These can be found in the Preferences-file by pretty-printing the file in the terminal (improving it with pygmentize) or saving a pretty-printed output to a file:
less Preferences | python -m json.tool | pygmentize -g
or
~/.config/chromium/Default$ less Preferences | python -m json.tool >> ~/Documents/output.txt
Searching through the file for language settings, you will find two relevant elements:
"intl": {
"accept_languages": "en-US,en,nb,fr-FR,gl,de,gr,pt-PT,es-ES,sv"
},
and
"spellcheck": {
"dictionaries": [
"en-US",
"nb",
"de",
"gr",
"pt-PT",
"es-ES",
"sv"
],
"dictionary": ""
}
Before you do anything else, it is wise to backup the Preferences-file... Next,you can alter the language settings by adding the following python-block to the bash script:
python - << EOF
import json
import os
data = json.load(open(os.path.expanduser("~/.config/chromium/Default/Preferences"), 'r'))
data['intl'] = {"accept_languages": "en-US,en,nb,fr-FR,gl,de,pt-PT,es-ES,sv"}
data['spellcheck'] = {"dictionaries":["en-US","nb","de","pt-PT","es-ES","sv"],"dictionary":""}
with open(os.path.expanduser('~/.config/chromium/Default/Preferences'), 'w') as outfile:
json.dump(data, outfile)
EOF
In this case, the script will remove Greek from the available languages and the spellchecker. Note that in order to add languages, you need to know the language code accepted by Chromium.
You can find more on reading and writing JSON here and here, and more on how to include Python scripts in bash scripts here.