Why shared?The Czech and Slovak languages are close enough for Google translate to do a very good job of translating one to the other. So you as a translator can choose if you work on the Czech or the Slovak version, and the other team will use the automatic translation. After that, they will just fix the parts where the machine translation failed, which will save a lot of work.
If you are interested, please help spreading the word. Or even better - help translating! :-)