Gettext .po file support

[lxg]

Language
PO files (Gettext)
These are files from the Gettext translation system ending with a .po extension.

Additional resources
https://en.wikipedia.org/wiki/Gettext
https://www.gnu.org/software/gettext/manual/html_node/PO-Files.html

Implementations of highlighting exist for different IDEs, e.g. https://github.com/textmate/gettext.tmbundle/blob/master/Syntaxes/Gettext.tmLanguage

Here’s an example showing different features of the language, though there’s a few more for a full coverage. Github also seems to support it (see below) though I think it’s not optimal.

msgid ""
msgstr ""
"Language: de_DE\n"
"Content-Type: text/plain; charset=utf-8\n"
"Plural-Forms: nplurals=2; plural=(n != 1);\n"

#: src/demo.js:78
msgid "Hello World"
msgstr "Hallo Welt"

#: src/demo.js:91
#: src/demo.js:92
msgid "1 child"
msgid_plural "%s children"
msgstr[0] "1 Kind"
msgstr[1] "%s Kinder"

#: src/demo.js:83
msgctxt "money"
msgid "Amount"
msgstr "Betrag"

#: src/demo.js:84
msgctxt "count"
msgid "Amount"
msgstr "Menge"