How to pass parameters from letters to the server in getJSON?

Question

JavaScript

$.getJSON("control.php", {act:1, word:word}, ​​function(data)
{
......
});

Strictly speaking, if word - consists of numbers, then everything is normally transmitted.
If word contains English or Russian letters, then nothing is transmitted.
How to be?

PS $.ajax({url: 'control.php', type: 'POST', dataType: 'json',.... doesn't work either.

Answer 1

act:1, word:'word'

Answer 2

The code is correct, the result is:
control.php?act=1&word=test
check the word variable, it may not exist
or pass word like this: 'word'