@idoodler Originally I translated them by creating a new file called il.js and added it to the translations.js file.

By debugging and reading the thread mentioned above I understood that something was wrong with the locale.

It got me thinking that Israel locale is he_IL and that maybe I used the IL instead of the HE.
That means that the MM uses that locale for other things too.
I changed the file name to he.js and updated the tranlations.js and that got things to work.