Can't enter specific letter

me too.
but in hebrew. the 'ת' (\u05EA) character will remove all the text while typing.
all the other 25 letters are accepted without any problem.

The modules javascript uses a keyup event handler that catches the key presses of a specific key, that in the US keymap is a comma.
so this will bug any other languages in which the comma located differently than the US keymap.

this patch will fix it.

The same for me, russian alphabet, letter Б (in place of comma)...

Does not seem to be a problem in the current version. Close?

subscribe, I have also a problem with the letter "Б" as in Geldora, even in the latest version of the module

Russian letter Б(in place of comma) is not written only If set multiple field, please Help to understand with this problem

Problem still exist with russian letter Б (comma on english keyword). Please note, it is often used letter in russian...

Today I pushed an update which should fix this problem. Could you try out(dev version therefore)?