Add internalization + language switch
The implementation of internalization with ttags and .po files. It stores locale in localStorage of the page. The default locale is English.
For more information: https://ttag.js.org/, https://www.gnu.org/software/gettext/manual/html_node/PO-Files.html
Closes: #10 (closed), #2 (closed)
Edited by Aleksandr Gumroian